1540940 has 12 divisors (see below), whose sum is σ = 3236016. Its totient is φ = 616368.

The previous prime is 1540927. The next prime is 1540949. The reversal of 1540940 is 490451.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1540949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38504 + ... + 38543.

It is an arithmetic number, because the mean of its divisors is an integer number (269668).

2^1540940 is an apocalyptic number.

1540940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540940 is an abundant number, since it is smaller than the sum of its proper divisors (1695076).

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

1540940 is a wasteful number, since it uses less digits than its factorization.

1540940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77056 (or 77054 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1540940 is about 1241.3460436156. The cubic root of 1540940 is about 115.5035261881.

The spelling of 1540940 in words is "one million, five hundred forty thousand, nine hundred forty".