54638690 has 8 divisors (see below), whose sum is σ = 98349660. Its totient is φ = 21855472.

The previous prime is 54638687. The next prime is 54638693. The reversal of 54638690 is 9683645.

It is an interprime number because it is at equal distance from previous prime (54638687) and next prime (54638693).

It can be written as a sum of positive squares in 2 ways, for example, as 51509329 + 3129361 = 7177^2 + 1769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×54638690² = 5970772889832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54638693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2731925 + ... + 2731944.

Almost surely, 2^54638690 is an apocalyptic number.

54638690 is a deficient number, since it is larger than the sum of its proper divisors (43710970).

54638690 is a wasteful number, since it uses less digits than its factorization.

54638690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5463876.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 54638690 is about 7391.7988338428. The cubic root of 54638690 is about 379.4606614653.

The spelling of 54638690 in words is "fifty-four million, six hundred thirty-eight thousand, six hundred ninety".