3907979540 has 12 divisors (see below), whose sum is σ = 8206757076. Its totient is φ = 1563191808.

The previous prime is 3907979531. The next prime is 3907979549. The reversal of 3907979540 is 459797093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3907979531) and next prime (3907979549).

It can be written as a sum of positive squares in 2 ways, for example, as 2638055044 + 1269924496 = 51362^2 + 35636^2 .

It is a super-2 number, since 2×3907979540² = 30544608170117223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3907979549) 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, 97699469 + ... + 97699508.

It is an arithmetic number, because the mean of its divisors is an integer number (683896423).

Almost surely, 2^3907979540 is an apocalyptic number.

It is an amenable number.

3907979540 is an abundant number, since it is smaller than the sum of its proper divisors (4298777536).

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

3907979540 is a wasteful number, since it uses less digits than its factorization.

3907979540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195398986 (or 195398984 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 53.

The square root of 3907979540 is about 62513.8347887890. The cubic root of 3907979540 is about 1575.1337136834.

The spelling of 3907979540 in words is "three billion, nine hundred seven million, nine hundred seventy-nine thousand, five hundred forty".