400790742 has 32 divisors (see below), whose sum is σ = 925893504. Its totient is φ = 114307200.

The previous prime is 400790707. The next prime is 400790743. The reversal of 400790742 is 247097004.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400790743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177484 + ... + 179727.

It is an arithmetic number, because the mean of its divisors is an integer number (28934172).

Almost surely, 2^400790742 is an apocalyptic number.

400790742 is an abundant number, since it is smaller than the sum of its proper divisors (525102762).

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

400790742 is a wasteful number, since it uses less digits than its factorization.

400790742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357244.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 400790742 is about 20019.7587897557. The cubic root of 400790742 is about 737.2914998842.

It can be divided in two parts, 4007 and 90742, that added together give a palindrome (94749).

The spelling of 400790742 in words is "four hundred million, seven hundred ninety thousand, seven hundred forty-two".