28976661 has 48 divisors (see below), whose sum is σ = 50838528. Its totient is φ = 15552000.

The previous prime is 28976659. The next prime is 28976663. The reversal of 28976661 is 16667982.

28976661 = 101³ + 102³ + ... + 121³.

It is an interprime number because it is at equal distance from previous prime (28976659) and next prime (28976663).

It is not a de Polignac number, because 28976661 - 2¹ = 28976659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28976663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72061 + ... + 72461.

It is an arithmetic number, because the mean of its divisors is an integer number (1059136).

Almost surely, 2^28976661 is an apocalyptic number.

28976661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28976661 is a deficient number, since it is larger than the sum of its proper divisors (21861867).

28976661 is a wasteful number, since it uses less digits than its factorization.

28976661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 479 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 28976661 is about 5382.9973992191. The cubic root of 28976661 is about 307.1492411354.

The spelling of 28976661 in words is "twenty-eight million, nine hundred seventy-six thousand, six hundred sixty-one".