28763961 has 16 divisors (see below), whose sum is σ = 40170624. Its totient is φ = 18273024.

The previous prime is 28763951. The next prime is 28763989. The reversal of 28763961 is 16936782.

It is a happy number.

It is not a de Polignac number, because 28763961 - 2¹⁴ = 28747577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28763921) 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, 22635 + ... + 23871.

It is an arithmetic number, because the mean of its divisors is an integer number (2510664).

Almost surely, 2^28763961 is an apocalyptic number.

It is an amenable number.

28763961 is a deficient number, since it is larger than the sum of its proper divisors (11406663).

28763961 is a wasteful number, since it uses less digits than its factorization.

28763961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its digits is 108864, while the sum is 42.

The square root of 28763961 is about 5363.2043593359. The cubic root of 28763961 is about 306.3958629889.

The spelling of 28763961 in words is "twenty-eight million, seven hundred sixty-three thousand, nine hundred sixty-one".