400157768 has 16 divisors (see below), whose sum is σ = 761495280. Its totient is φ = 197092368.

The previous prime is 400157767. The next prime is 400157819. The reversal of 400157768 is 867751004.

It is not an unprimeable number, because it can be changed into a prime (400157761) 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, 372746 + ... + 373817.

It is an arithmetic number, because the mean of its divisors is an integer number (47593455).

Almost surely, 2^400157768 is an apocalyptic number.

It is an amenable number.

400157768 is a deficient number, since it is larger than the sum of its proper divisors (361337512).

400157768 is a wasteful number, since it uses less digits than its factorization.

400157768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746636 (or 746632 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 400157768 is about 20003.9438111588. The cubic root of 400157768 is about 736.9031573752.

The spelling of 400157768 in words is "four hundred million, one hundred fifty-seven thousand, seven hundred sixty-eight".