28470990 has 16 divisors (see below), whose sum is σ = 68330448. Its totient is φ = 7592256.

The previous prime is 28470983. The next prime is 28470997. The reversal of 28470990 is 9907482.

It is an interprime number because it is at equal distance from previous prime (28470983) and next prime (28470997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28470997) 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, 474487 + ... + 474546.

It is an arithmetic number, because the mean of its divisors is an integer number (4270653).

Almost surely, 2^28470990 is an apocalyptic number.

28470990 is an abundant number, since it is smaller than the sum of its proper divisors (39859458).

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

28470990 is a wasteful number, since it uses less digits than its factorization.

28470990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949043.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 28470990 is about 5335.8213988101. The cubic root of 28470990 is about 305.3520614338.

The spelling of 28470990 in words is "twenty-eight million, four hundred seventy thousand, nine hundred ninety".