28947490 has 64 divisors (see below), whose sum is σ = 63286272. Its totient is φ = 9388800.

The previous prime is 28947461. The next prime is 28947497. The reversal of 28947490 is 9474982.

It is not an unprimeable number, because it can be changed into a prime (28947497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44004 + ... + 44656.

It is an arithmetic number, because the mean of its divisors is an integer number (988848).

Almost surely, 2^28947490 is an apocalyptic number.

28947490 is an abundant number, since it is smaller than the sum of its proper divisors (34338782).

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

28947490 is a wasteful number, since it uses less digits than its factorization.

28947490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28947490 is about 5380.2871670572. The cubic root of 28947490 is about 307.0461367918.

The spelling of 28947490 in words is "twenty-eight million, nine hundred forty-seven thousand, four hundred ninety".