27977952 has 24 divisors (see below), whose sum is σ = 73442376. Its totient is φ = 9325952.

The previous prime is 27977923. The next prime is 27977981. The reversal of 27977952 is 25977972.

It is an interprime number because it is at equal distance from previous prime (27977923) and next prime (27977981).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×27977952² = 1565531596228608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145623 + ... + 145814.

It is an arithmetic number, because the mean of its divisors is an integer number (3060099).

Almost surely, 2^27977952 is an apocalyptic number.

It is an amenable number.

27977952 is an abundant number, since it is smaller than the sum of its proper divisors (45464424).

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

27977952 is a wasteful number, since it uses less digits than its factorization.

27977952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291450 (or 291442 counting only the distinct ones).

The product of its digits is 555660, while the sum is 48.

The square root of 27977952 is about 5289.4188716720. The cubic root of 27977952 is about 303.5791730277.

The spelling of 27977952 in words is "twenty-seven million, nine hundred seventy-seven thousand, nine hundred fifty-two".