400647330 has 128 divisors (see below), whose sum is σ = 1139650560. Its totient is φ = 99809280.

The previous prime is 400647311. The next prime is 400647341. The reversal of 400647330 is 33746004.

It is a super-2 number, since 2×400647330² = 321036566072257800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 400647294 and 400647303.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 876462 + ... + 876918.

It is an arithmetic number, because the mean of its divisors is an integer number (8903520).

Almost surely, 2^400647330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400647330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569825280).

400647330 is an abundant number, since it is smaller than the sum of its proper divisors (739003230).

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

400647330 is a wasteful number, since it uses less digits than its factorization.

400647330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 400647330 is about 20016.1767078531. The cubic root of 400647330 is about 737.2035495303.

The spelling of 400647330 in words is "four hundred million, six hundred forty-seven thousand, three hundred thirty".