400434659 has 4 divisors (see below), whose sum is σ = 410201400. Its totient is φ = 390667920.

The previous prime is 400434653. The next prime is 400434673. The reversal of 400434659 is 956434004.

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

It is a cyclic number.

It is not a de Polignac number, because 400434659 - 2⁸ = 400434403 is a prime.

It is a super-2 number, since 2×400434659² = 320695832256892562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400434653) 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, 4883309 + ... + 4883390.

It is an arithmetic number, because the mean of its divisors is an integer number (102550350).

Almost surely, 2^400434659 is an apocalyptic number.

400434659 is a deficient number, since it is larger than the sum of its proper divisors (9766741).

400434659 is an equidigital number, since it uses as much as digits as its factorization.

400434659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9766740.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 400434659 is about 20010.8635245958. The cubic root of 400434659 is about 737.0730860250.

The spelling of 400434659 in words is "four hundred million, four hundred thirty-four thousand, six hundred fifty-nine".