400747770 has 64 divisors (see below), whose sum is σ = 1084659840. Its totient is φ = 105266304.

The previous prime is 400747759. The next prime is 400747793. The reversal of 400747770 is 77747004.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7014 + ... + 29166.

It is an arithmetic number, because the mean of its divisors is an integer number (16947810).

Almost surely, 2^400747770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400747770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (542329920).

400747770 is an abundant number, since it is smaller than the sum of its proper divisors (683912070).

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

400747770 is a wasteful number, since it uses less digits than its factorization.

400747770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22236 (or 22230 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 400747770 is about 20018.6855212824. The cubic root of 400747770 is about 737.2651486245.

The spelling of 400747770 in words is "four hundred million, seven hundred forty-seven thousand, seven hundred seventy".