400067040 has 96 divisors (see below), whose sum is σ = 1326568320. Its totient is φ = 101067264.

The previous prime is 400067033. The next prime is 400067071. The reversal of 400067040 is 40760004.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 400066998 and 400067016.

It is a congruent number.

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, 12814 + ... + 31053.

It is an arithmetic number, because the mean of its divisors is an integer number (13818420).

Almost surely, 2^400067040 is an apocalyptic number.

400067040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400067040 is an abundant number, since it is smaller than the sum of its proper divisors (926501280).

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

400067040 is a wasteful number, since it uses less digits than its factorization.

400067040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43904 (or 43896 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 400067040 is about 20001.6759297815. The cubic root of 400067040 is about 736.8474603406.

The spelling of 400067040 in words is "four hundred million, sixty-seven thousand, forty".