28763955 has 24 divisors (see below), whose sum is σ = 54390960. Its totient is φ = 13945920.

The previous prime is 28763951. The next prime is 28763989. The reversal of 28763955 is 55936782.

28763955 = 696² + 697² + ... + 750².

It is a happy number.

28763955 is a `hidden beast` number, since 2 + 8 + 7 + 639 + 5 + 5 = 666.

It is not a de Polignac number, because 28763955 - 2² = 28763951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28763955.

It is not an unprimeable number, because it can be changed into a prime (28763951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28560 + ... + 29549.

It is an arithmetic number, because the mean of its divisors is an integer number (2266290).

Almost surely, 2^28763955 is an apocalyptic number.

28763955 is a deficient number, since it is larger than the sum of its proper divisors (25627005).

28763955 is a wasteful number, since it uses less digits than its factorization.

28763955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58131 (or 58128 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 28763955 is about 5363.2037999688. The cubic root of 28763955 is about 306.3958416847.

The spelling of 28763955 in words is "twenty-eight million, seven hundred sixty-three thousand, nine hundred fifty-five".