400400406740 has 24 divisors (see below), whose sum is σ = 841300156032. Its totient is φ = 160072676640.

The previous prime is 400400406727. The next prime is 400400406787. The reversal of 400400406740 is 47604004004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5430344 + ... + 5503583.

It is an arithmetic number, because the mean of its divisors is an integer number (35054173168).

Almost surely, 2^400400406740 is an apocalyptic number.

It is an amenable number.

400400406740 is an abundant number, since it is smaller than the sum of its proper divisors (440899749292).

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

400400406740 is a wasteful number, since it uses less digits than its factorization.

400400406740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10935767 (or 10935765 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The spelling of 400400406740 in words is "four hundred billion, four hundred million, four hundred six thousand, seven hundred forty".