964423638 has 32 divisors (see below), whose sum is σ = 2144193120. Its totient is φ = 321320160.

The previous prime is 964423637. The next prime is 964423639. The reversal of 964423638 is 836324469.

964423638 is a `hidden beast` number, since 9 + 6 + 4 + 4 + 2 + 3 + 638 = 666.

It is an interprime number because it is at equal distance from previous prime (964423637) and next prime (964423639).

It is a super-2 number, since 2×964423638² = 1860225907066310088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 964423593 and 964423602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (964423633) 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, 189568 + ... + 194588.

It is an arithmetic number, because the mean of its divisors is an integer number (67006035).

Almost surely, 2^964423638 is an apocalyptic number.

964423638 is an abundant number, since it is smaller than the sum of its proper divisors (1179769482).

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

964423638 is a wasteful number, since it uses less digits than its factorization.

964423638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8589 (or 8583 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 964423638 is about 31055.1708737853. The cubic root of 964423638 is about 987.9977346187.

The spelling of 964423638 in words is "nine hundred sixty-four million, four hundred twenty-three thousand, six hundred thirty-eight".