400047957 has 16 divisors (see below), whose sum is σ = 600785280. Its totient is φ = 263043936.

The previous prime is 400047929. The next prime is 400047997. The reversal of 400047957 is 759740004.

It is a happy number.

It is not a de Polignac number, because 400047957 - 2¹¹ = 400045909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400047917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99513 + ... + 103454.

It is an arithmetic number, because the mean of its divisors is an integer number (37549080).

Almost surely, 2^400047957 is an apocalyptic number.

It is an amenable number.

400047957 is a deficient number, since it is larger than the sum of its proper divisors (200737323).

400047957 is a wasteful number, since it uses less digits than its factorization.

400047957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203049 (or 203043 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 400047957 is about 20001.1988890666. The cubic root of 400047957 is about 736.8357444011.

It can be divided in two parts, 40004 and 7957, that added together give a square (47961 = 219²).

The spelling of 400047957 in words is "four hundred million, forty-seven thousand, nine hundred fifty-seven".