400492081634 has 8 divisors (see below), whose sum is σ = 600767475420. Its totient is φ = 200236256496.

The previous prime is 400492081607. The next prime is 400492081643. The reversal of 400492081634 is 436180294004.

It can be written as a sum of positive squares in 2 ways, for example, as 396969303025 + 3522778609 = 630055^2 + 59353^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 400492081591 and 400492081600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4840889 + ... + 4922924.

Almost surely, 2^400492081634 is an apocalyptic number.

400492081634 is a deficient number, since it is larger than the sum of its proper divisors (200275393786).

400492081634 is a wasteful number, since it uses less digits than its factorization.

400492081634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9784324.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 400492081634 in words is "four hundred billion, four hundred ninety-two million, eighty-one thousand, six hundred thirty-four".