400040399994 has 32 divisors (see below), whose sum is σ = 803015411904. Its totient is φ = 132857825280.

The previous prime is 400040399981. The next prime is 400040400047. The reversal of 400040399994 is 499993040004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20639692 + ... + 20659064.

It is an arithmetic number, because the mean of its divisors is an integer number (25094231622).

Almost surely, 2^400040399994 is an apocalyptic number.

400040399994 is an abundant number, since it is smaller than the sum of its proper divisors (402975011910).

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

400040399994 is a wasteful number, since it uses less digits than its factorization.

400040399994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31822.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 400040399994 in words is "four hundred billion, forty million, three hundred ninety-nine thousand, nine hundred ninety-four".