28507954 has 8 divisors (see below), whose sum is σ = 42803820. Its totient is φ = 14240016.

The previous prime is 28507943. The next prime is 28507967. The reversal of 28507954 is 45970582.

It can be written as a sum of positive squares in 2 ways, for example, as 22819729 + 5688225 = 4777^2 + 2385^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28507954² = 1625406882532232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4209 + ... + 8644.

Almost surely, 2^28507954 is an apocalyptic number.

28507954 is a deficient number, since it is larger than the sum of its proper divisors (14295866).

28507954 is a wasteful number, since it uses less digits than its factorization.

28507954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13964.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 28507954 is about 5339.2840344001. The cubic root of 28507954 is about 305.4841508864.

The spelling of 28507954 in words is "twenty-eight million, five hundred seven thousand, nine hundred fifty-four".