400734040 has 32 divisors (see below), whose sum is σ = 1030459680. Its totient is φ = 137394432.

The previous prime is 400734029. The next prime is 400734053. The reversal of 400734040 is 40437004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715317 + ... + 715876.

It is an arithmetic number, because the mean of its divisors is an integer number (32201865).

Almost surely, 2^400734040 is an apocalyptic number.

400734040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400734040 is an abundant number, since it is smaller than the sum of its proper divisors (629725640).

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

400734040 is a wasteful number, since it uses less digits than its factorization.

400734040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431211 (or 1431207 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 400734040 is about 20018.3425887360. The cubic root of 400734040 is about 737.2567287265.

The spelling of 400734040 in words is "four hundred million, seven hundred thirty-four thousand, forty".