28574091 has 48 divisors (see below), whose sum is σ = 51367680. Its totient is φ = 14904000.

The previous prime is 28574069. The next prime is 28574107. The reversal of 28574091 is 19047582.

It is not a de Polignac number, because 28574091 - 2¹⁴ = 28557707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28574041) 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, 113716 + ... + 113966.

It is an arithmetic number, because the mean of its divisors is an integer number (1070160).

Almost surely, 2^28574091 is an apocalyptic number.

28574091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28574091 is a deficient number, since it is larger than the sum of its proper divisors (22793589).

28574091 is a wasteful number, since it uses less digits than its factorization.

28574091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 28574091 is about 5345.4738798352. The cubic root of 28574091 is about 305.7202043221.

The spelling of 28574091 in words is "twenty-eight million, five hundred seventy-four thousand, ninety-one".