28573737 has 16 divisors (see below), whose sum is σ = 38919168. Its totient is φ = 18642960.

The previous prime is 28573709. The next prime is 28573757. The reversal of 28573737 is 73737582.

It is not a de Polignac number, because 28573737 - 2⁶ = 28573673 is a prime.

It is a super-2 number, since 2×28573737² = 1632916892290338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28573757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34308 + ... + 35130.

It is an arithmetic number, because the mean of its divisors is an integer number (2432448).

Almost surely, 2^28573737 is an apocalyptic number.

It is an amenable number.

28573737 is a deficient number, since it is larger than the sum of its proper divisors (10345431).

28573737 is a wasteful number, since it uses less digits than its factorization.

28573737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its digits is 246960, while the sum is 42.

The square root of 28573737 is about 5345.4407676075. The cubic root of 28573737 is about 305.7189418101.

The spelling of 28573737 in words is "twenty-eight million, five hundred seventy-three thousand, seven hundred thirty-seven".