28649730 has 16 divisors (see below), whose sum is σ = 68759424. Its totient is φ = 7639920.

The previous prime is 28649717. The next prime is 28649741. The reversal of 28649730 is 3794682.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477466 + ... + 477525.

It is an arithmetic number, because the mean of its divisors is an integer number (4297464).

Almost surely, 2^28649730 is an apocalyptic number.

28649730 is an abundant number, since it is smaller than the sum of its proper divisors (40109694).

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

28649730 is a wasteful number, since it uses less digits than its factorization.

28649730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955001.

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

The square root of 28649730 is about 5352.5442548381. The cubic root of 28649730 is about 305.9897258287.

The spelling of 28649730 in words is "twenty-eight million, six hundred forty-nine thousand, seven hundred thirty".