400828770 has 64 divisors (see below), whose sum is σ = 1097792640. Its totient is φ = 103996224.

The previous prime is 400828711. The next prime is 400828781. The reversal of 400828770 is 77828004.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10072 + ... + 30051.

It is an arithmetic number, because the mean of its divisors is an integer number (17153010).

Almost surely, 2^400828770 is an apocalyptic number.

400828770 is an abundant number, since it is smaller than the sum of its proper divisors (696963870).

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

400828770 is a wasteful number, since it uses less digits than its factorization.

400828770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40176 (or 40170 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 400828770 is about 20020.7085289207. The cubic root of 400828770 is about 737.3148178167.

The spelling of 400828770 in words is "four hundred million, eight hundred twenty-eight thousand, seven hundred seventy".