400894002 has 32 divisors (see below), whose sum is σ = 929612160. Its totient is φ = 127820880.

The previous prime is 400893959. The next prime is 400894007. The reversal of 400894002 is 200498004.

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

It is not an unprimeable number, because it can be changed into a prime (400894007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160149 + ... + 162632.

It is an arithmetic number, because the mean of its divisors is an integer number (29050380).

Almost surely, 2^400894002 is an apocalyptic number.

400894002 is an abundant number, since it is smaller than the sum of its proper divisors (528718158).

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

400894002 is a wasteful number, since it uses less digits than its factorization.

400894002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322815 (or 322809 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 400894002 is about 20022.3375758177. The cubic root of 400894002 is about 737.3548132087.

The spelling of 400894002 in words is "four hundred million, eight hundred ninety-four thousand, two".