28464690 has 32 divisors (see below), whose sum is σ = 68746176. Its totient is φ = 7542720.

The previous prime is 28464677. The next prime is 28464691. The reversal of 28464690 is 9646482.

It is a super-2 number, since 2×28464690² = 1620477153592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28464691) 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, 1980 + ... + 7800.

It is an arithmetic number, because the mean of its divisors is an integer number (2148318).

Almost surely, 2^28464690 is an apocalyptic number.

28464690 is an abundant number, since it is smaller than the sum of its proper divisors (40281486).

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

28464690 is a wasteful number, since it uses less digits than its factorization.

28464690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 28464690 is about 5335.2310165540. The cubic root of 28464690 is about 305.3295372211.

The spelling of 28464690 in words is "twenty-eight million, four hundred sixty-four thousand, six hundred ninety".