1550425440 has 48 divisors (see below), whose sum is σ = 4883841648. Its totient is φ = 413446656.

The previous prime is 1550425433. The next prime is 1550425489. The reversal of 1550425440 is 445240551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1550425398 and 1550425407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1614547 + ... + 1615506.

It is an arithmetic number, because the mean of its divisors is an integer number (101746701).

Almost surely, 2^1550425440 is an apocalyptic number.

1550425440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550425440 is an abundant number, since it is smaller than the sum of its proper divisors (3333416208).

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

1550425440 is a wasteful number, since it uses less digits than its factorization.

1550425440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230071 (or 3230063 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 1550425440 is about 39375.4420927562. The cubic root of 1550425440 is about 1157.4004013153.

Adding to 1550425440 its reverse (445240551), we get a palindrome (1995665991).

The spelling of 1550425440 in words is "one billion, five hundred fifty million, four hundred twenty-five thousand, four hundred forty".