28157415 has 32 divisors (see below), whose sum is σ = 52932096. Its totient is φ = 12600960.

The previous prime is 28157383. The next prime is 28157429. The reversal of 28157415 is 51475182.

It is not a de Polignac number, because 28157415 - 2⁵ = 28157383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4419 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (1654128).

Almost surely, 2^28157415 is an apocalyptic number.

28157415 is a deficient number, since it is larger than the sum of its proper divisors (24774681).

28157415 is a wasteful number, since it uses less digits than its factorization.

28157415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13159.

The product of its digits is 11200, while the sum is 33.

The square root of 28157415 is about 5306.3560943457. The cubic root of 28157415 is about 304.2268872653.

The spelling of 28157415 in words is "twenty-eight million, one hundred fifty-seven thousand, four hundred fifteen".