400028898 has 32 divisors (see below), whose sum is σ = 831393792. Its totient is φ = 128178000.

The previous prime is 400028861. The next prime is 400028939. The reversal of 400028898 is 898820004.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 20965 + ... + 35207.

It is an arithmetic number, because the mean of its divisors is an integer number (25981056).

Almost surely, 2^400028898 is an apocalyptic number.

400028898 is an abundant number, since it is smaller than the sum of its proper divisors (431364894).

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

400028898 is a wasteful number, since it uses less digits than its factorization.

400028898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14430.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 400028898 is about 20000.7224369521. The cubic root of 400028898 is about 736.8240428245.

The spelling of 400028898 in words is "four hundred million, twenty-eight thousand, eight hundred ninety-eight".