55438764 has 12 divisors (see below), whose sum is σ = 129357144. Its totient is φ = 18479584.

The previous prime is 55438759. The next prime is 55438769. The reversal of 55438764 is 46783455.

It is an interprime number because it is at equal distance from previous prime (55438759) and next prime (55438769).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (55438769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2309937 + ... + 2309960.

It is an arithmetic number, because the mean of its divisors is an integer number (10779762).

Almost surely, 2^55438764 is an apocalyptic number.

It is an amenable number.

55438764 is an abundant number, since it is smaller than the sum of its proper divisors (73918380).

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

55438764 is a wasteful number, since it uses less digits than its factorization.

55438764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619904 (or 4619902 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 55438764 is about 7445.7211873666. The cubic root of 55438764 is about 381.3038406807.

The spelling of 55438764 in words is "fifty-five million, four hundred thirty-eight thousand, seven hundred sixty-four".