400733957 has 4 divisors (see below), whose sum is σ = 431559660. Its totient is φ = 369908256.

The previous prime is 400733951. The next prime is 400733989. The reversal of 400733957 is 759337004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 245831041 + 154902916 = 15679^2 + 12446^2 .

It is a cyclic number.

It is not a de Polignac number, because 400733957 - 2¹⁶ = 400668421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400733957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400733951) 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, 15412832 + ... + 15412857.

It is an arithmetic number, because the mean of its divisors is an integer number (107889915).

Almost surely, 2^400733957 is an apocalyptic number.

It is an amenable number.

400733957 is a deficient number, since it is larger than the sum of its proper divisors (30825703).

400733957 is a wasteful number, since it uses less digits than its factorization.

400733957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30825702.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 400733957 is about 20018.3405156372. The cubic root of 400733957 is about 737.2566778263.

The spelling of 400733957 in words is "four hundred million, seven hundred thirty-three thousand, nine hundred fifty-seven".