400190040 has 48 divisors (see below), whose sum is σ = 1300618800. Its totient is φ = 106717248.

The previous prime is 400190033. The next prime is 400190069. The reversal of 400190040 is 40091004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 400189995 and 400190022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555460 + ... + 556179.

It is an arithmetic number, because the mean of its divisors is an integer number (27096225).

Almost surely, 2^400190040 is an apocalyptic number.

400190040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400190040 is an abundant number, since it is smaller than the sum of its proper divisors (900428760).

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

400190040 is a wasteful number, since it uses less digits than its factorization.

400190040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111656 (or 1111649 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 400190040 is about 20004.7504358340. The cubic root of 400190040 is about 736.9229668115.

The spelling of 400190040 in words is "four hundred million, one hundred ninety thousand, forty".