28922501 has 2 divisors, whose sum is σ = 28922502. Its totient is φ = 28922500.

The previous prime is 28922497. The next prime is 28922513. The reversal of 28922501 is 10522982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19589476 + 9333025 = 4426^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 28922501 - 2² = 28922497 is a prime.

It is a super-2 number, since 2×28922501² = 1673022128190002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28922521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14461250 + 14461251.

It is an arithmetic number, because the mean of its divisors is an integer number (14461251).

Almost surely, 2^28922501 is an apocalyptic number.

It is an amenable number.

28922501 is a deficient number, since it is larger than the sum of its proper divisors (1).

28922501 is an equidigital number, since it uses as much as digits as its factorization.

28922501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28922501 is about 5377.9643918494. The cubic root of 28922501 is about 306.9577585499.

The spelling of 28922501 in words is "twenty-eight million, nine hundred twenty-two thousand, five hundred one".