28734690 has 16 divisors (see below), whose sum is σ = 68963328. Its totient is φ = 7662576.

The previous prime is 28734677. The next prime is 28734697. The reversal of 28734690 is 9643782.

It is a super-2 number, since 2×28734690² = 1651364818792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28734697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478882 + ... + 478941.

It is an arithmetic number, because the mean of its divisors is an integer number (4310208).

Almost surely, 2^28734690 is an apocalyptic number.

28734690 is an abundant number, since it is smaller than the sum of its proper divisors (40228638).

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

28734690 is a wasteful number, since it uses less digits than its factorization.

28734690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957833.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 28734690 is about 5360.4747924041. The cubic root of 28734690 is about 306.2918954207.

The spelling of 28734690 in words is "twenty-eight million, seven hundred thirty-four thousand, six hundred ninety".