400742457 has 8 divisors (see below), whose sum is σ = 535188960. Its totient is φ = 266728800.

The previous prime is 400742453. The next prime is 400742473. The reversal of 400742457 is 754247004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400742457 - 2² = 400742453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400742453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106044 + ... + 109757.

It is an arithmetic number, because the mean of its divisors is an integer number (66898620).

Almost surely, 2^400742457 is an apocalyptic number.

It is an amenable number.

400742457 is a deficient number, since it is larger than the sum of its proper divisors (134446503).

400742457 is a wasteful number, since it uses less digits than its factorization.

400742457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216423.

The product of its (nonzero) digits is 31360, while the sum is 33.

The square root of 400742457 is about 20018.5528198219. The cubic root of 400742457 is about 737.2618904595.

It can be divided in two parts, 4007 and 42457, that added together give a palindrome (46464).

The spelling of 400742457 in words is "four hundred million, seven hundred forty-two thousand, four hundred fifty-seven".