28971490 has 16 divisors (see below), whose sum is σ = 54416448. Its totient is φ = 11084656.

The previous prime is 28971487. The next prime is 28971497. The reversal of 28971490 is 9417982.

It is not an unprimeable number, because it can be changed into a prime (28971497) 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, 62752 + ... + 63211.

It is an arithmetic number, because the mean of its divisors is an integer number (3401028).

Almost surely, 2^28971490 is an apocalyptic number.

28971490 is a deficient number, since it is larger than the sum of its proper divisors (25444958).

28971490 is a wasteful number, since it uses less digits than its factorization.

28971490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125993.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 28971490 is about 5382.5170691787. The cubic root of 28971490 is about 307.1309693820.

The spelling of 28971490 in words is "twenty-eight million, nine hundred seventy-one thousand, four hundred ninety".