28501992 has 48 divisors (see below), whose sum is σ = 77444640. Its totient is φ = 9469728.

The previous prime is 28501987. The next prime is 28501999. The reversal of 28501992 is 29910582.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28501999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35823 + ... + 36609.

It is an arithmetic number, because the mean of its divisors is an integer number (1613430).

Almost surely, 2^28501992 is an apocalyptic number.

It is an amenable number.

28501992 is an abundant number, since it is smaller than the sum of its proper divisors (48942648).

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

28501992 is a wasteful number, since it uses less digits than its factorization.

28501992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 28501992 is about 5338.7256906494. The cubic root of 28501992 is about 305.4628536315.

The spelling of 28501992 in words is "twenty-eight million, five hundred one thousand, nine hundred ninety-two".