28915891310 has 32 divisors (see below), whose sum is σ = 53218788480. Its totient is φ = 11306897152.

The previous prime is 28915891309. The next prime is 28915891313. The reversal of 28915891310 is 1319851982.

It is a happy number.

It is a super-2 number, since 2×28915891310² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28915891313) 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, 366896 + ... + 438684.

It is an arithmetic number, because the mean of its divisors is an integer number (1663087140).

Almost surely, 2^28915891310 is an apocalyptic number.

28915891310 is a deficient number, since it is larger than the sum of its proper divisors (24302897170).

28915891310 is a wasteful number, since it uses less digits than its factorization.

28915891310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72700.

The product of its (nonzero) digits is 155520, while the sum is 47.

The spelling of 28915891310 in words is "twenty-eight billion, nine hundred fifteen million, eight hundred ninety-one thousand, three hundred ten".