989472638 has 16 divisors (see below), whose sum is σ = 1850442624. Its totient is φ = 385508760.

The previous prime is 989472637. The next prime is 989472647. The reversal of 989472638 is 836274989.

It is a happy number.

It is a super-2 number, since 2×989472638² = 1958112202701358088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989472637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3212420 + ... + 3212727.

It is an arithmetic number, because the mean of its divisors is an integer number (115652664).

Almost surely, 2^989472638 is an apocalyptic number.

989472638 is a deficient number, since it is larger than the sum of its proper divisors (860969986).

989472638 is a wasteful number, since it uses less digits than its factorization.

989472638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6425167.

The product of its digits is 5225472, while the sum is 56.

The square root of 989472638 is about 31455.8839964799. The cubic root of 989472638 is about 996.4784928777.

The spelling of 989472638 in words is "nine hundred eighty-nine million, four hundred seventy-two thousand, six hundred thirty-eight".