28940616 has 24 divisors (see below), whose sum is σ = 78381030. Its totient is φ = 9646848.

The previous prime is 28940609. The next prime is 28940627. The reversal of 28940616 is 61604982.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 10536516 = 4290^2 + 3246^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200905 + ... + 201048.

Almost surely, 2^28940616 is an apocalyptic number.

It is an amenable number.

28940616 is an abundant number, since it is smaller than the sum of its proper divisors (49440414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28940616 is a wasteful number, since it uses less digits than its factorization.

28940616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401965 (or 401958 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28940616 is about 5379.6483156429. The cubic root of 28940616 is about 307.0218306863.

The spelling of 28940616 in words is "twenty-eight million, nine hundred forty thousand, six hundred sixteen".