1204551440 has 40 divisors (see below), whose sum is σ = 2803313880. Its totient is φ = 481350656.

The previous prime is 1204551437. The next prime is 1204551443. The reversal of 1204551440 is 441554021.

It is an interprime number because it is at equal distance from previous prime (1204551437) and next prime (1204551443).

It can be written as a sum of positive squares in 4 ways, for example, as 99121936 + 1105429504 = 9956^2 + 33248^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1204551443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81932 + ... + 95508.

It is an arithmetic number, because the mean of its divisors is an integer number (70082847).

Almost surely, 2^1204551440 is an apocalyptic number.

1204551440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1204551440 is an abundant number, since it is smaller than the sum of its proper divisors (1598762440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1204551440 is a wasteful number, since it uses less digits than its factorization.

1204551440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14699 (or 14693 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1204551440 is about 34706.6483544580. The cubic root of 1204551440 is about 1064.0003815929. Note that the first 3 decimals are identical.

The spelling of 1204551440 in words is "one billion, two hundred four million, five hundred fifty-one thousand, four hundred forty".