400078672 has 20 divisors (see below), whose sum is σ = 885888736. Its totient is φ = 171462240.

The previous prime is 400078667. The next prime is 400078691. The reversal of 400078672 is 276870004.

It is a congruent number.

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, 1785954 + ... + 1786177.

Almost surely, 2^400078672 is an apocalyptic number.

It is an amenable number.

400078672 is an abundant number, since it is smaller than the sum of its proper divisors (485810064).

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

400078672 is a wasteful number, since it uses less digits than its factorization.

400078672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572146 (or 3572140 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 400078672 is about 20001.9667033020. The cubic root of 400078672 is about 736.8546015826.

The spelling of 400078672 in words is "four hundred million, seventy-eight thousand, six hundred seventy-two".