27929385 has 48 divisors (see below), whose sum is σ = 55935360. Its totient is φ = 12741120.

The previous prime is 27929381. The next prime is 27929387. The reversal of 27929385 is 58392972.

It is not a de Polignac number, because 27929385 - 2² = 27929381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27929385.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27929381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6756 + ... + 10074.

It is an arithmetic number, because the mean of its divisors is an integer number (1165320).

Almost surely, 2^27929385 is an apocalyptic number.

It is an amenable number.

27929385 is an abundant number, since it is smaller than the sum of its proper divisors (28005975).

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

27929385 is a wasteful number, since it uses less digits than its factorization.

27929385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3358 (or 3355 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 27929385 is about 5284.8259195550. The cubic root of 27929385 is about 303.4034099926.

It can be divided in two parts, 279293 and 85, that added together give a triangular number (279378 = T₇₄₇).

The spelling of 27929385 in words is "twenty-seven million, nine hundred twenty-nine thousand, three hundred eighty-five".