28767501 has 32 divisors (see below), whose sum is σ = 51276800. Its totient is φ = 15571440.

The previous prime is 28767493. The next prime is 28767509. The reversal of 28767501 is 10576782.

It is an interprime number because it is at equal distance from previous prime (28767493) and next prime (28767509).

It is not a de Polignac number, because 28767501 - 2³ = 28767493 is a prime.

It is a super-2 number, since 2×28767501² = 1655138227570002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28767509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415 + ... + 7596.

It is an arithmetic number, because the mean of its divisors is an integer number (1602400).

Almost surely, 2^28767501 is an apocalyptic number.

28767501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28767501 is a deficient number, since it is larger than the sum of its proper divisors (22509299).

28767501 is a wasteful number, since it uses less digits than its factorization.

28767501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8046 (or 8040 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 28767501 is about 5363.5343757638. The cubic root of 28767501 is about 306.4084319215.

The spelling of 28767501 in words is "twenty-eight million, seven hundred sixty-seven thousand, five hundred one".