400740807 has 8 divisors (see below), whose sum is σ = 534555376. Its totient is φ = 267043392.

The previous prime is 400740757. The next prime is 400740811. The reversal of 400740807 is 708047004.

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

It is not a de Polignac number, because 400740807 - 2⁷ = 400740679 is a prime.

It is a super-2 number, since 2×400740807² = 321186388790022498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400740817) 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 7 ways as a sum of consecutive naturals, for example, 20968 + ... + 35229.

It is an arithmetic number, because the mean of its divisors is an integer number (66819422).

Almost surely, 2^400740807 is an apocalyptic number.

400740807 is a deficient number, since it is larger than the sum of its proper divisors (133814569).

400740807 is a wasteful number, since it uses less digits than its factorization.

400740807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58577.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 400740807 is about 20018.5116080092. The cubic root of 400740807 is about 737.2608786012.

The spelling of 400740807 in words is "four hundred million, seven hundred forty thousand, eight hundred seven".