3957640134 has 24 divisors (see below), whose sum is σ = 9207571608. Its totient is φ = 1130754240.

The previous prime is 3957640133. The next prime is 3957640151. The reversal of 3957640134 is 4310467593.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957640133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6730387 + ... + 6730974.

It is an arithmetic number, because the mean of its divisors is an integer number (383648817).

Almost surely, 2^3957640134 is an apocalyptic number.

3957640134 is an abundant number, since it is smaller than the sum of its proper divisors (5249931474).

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

3957640134 is a wasteful number, since it uses less digits than its factorization.

3957640134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13461380 (or 13461373 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 3957640134 is about 62909.7777296979. Note that the first 4 decimals coincide. The cubic root of 3957640134 is about 1581.7776464582. Note that the first 3 decimals are identical.

The spelling of 3957640134 in words is "three billion, nine hundred fifty-seven million, six hundred forty thousand, one hundred thirty-four".