28700370 has 48 divisors (see below), whose sum is σ = 74917440. Its totient is φ = 7623072.

The previous prime is 28700333. The next prime is 28700381. The reversal of 28700370 is 7300782.

It is a super-2 number, since 2×28700370² = 1647422476273800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30771 + ... + 31689.

It is an arithmetic number, because the mean of its divisors is an integer number (1560780).

Almost surely, 2^28700370 is an apocalyptic number.

28700370 is an abundant number, since it is smaller than the sum of its proper divisors (46217070).

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

28700370 is a wasteful number, since it uses less digits than its factorization.

28700370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279 (or 1276 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 28700370 is about 5357.2726269997. The cubic root of 28700370 is about 306.1699043628.

The spelling of 28700370 in words is "twenty-eight million, seven hundred thousand, three hundred seventy".