475399644 has 24 divisors (see below), whose sum is σ = 1109850000. Its totient is φ = 158383104.

The previous prime is 475399621. The next prime is 475399667. The reversal of 475399644 is 446993574.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (475399621) and next prime (475399667).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15982 + ... + 34730.

It is an arithmetic number, because the mean of its divisors is an integer number (46243750).

Almost surely, 2^475399644 is an apocalyptic number.

It is an amenable number.

475399644 is an abundant number, since it is smaller than the sum of its proper divisors (634450356).

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

475399644 is a wasteful number, since it uses less digits than its factorization.

475399644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20869 (or 20867 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The square root of 475399644 is about 21803.6612521842. The cubic root of 475399644 is about 780.4641353350.

The spelling of 475399644 in words is "four hundred seventy-five million, three hundred ninety-nine thousand, six hundred forty-four".