30879040 has 28 divisors (see below), whose sum is σ = 73531476. Its totient is φ = 12351488.

The previous prime is 30879011. The next prime is 30879059. The reversal of 30879040 is 4097803.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5234944 + 25644096 = 2288^2 + 5064^2 .

It is a super-2 number, since 2×30879040² = 1907030222643200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30878993 and 30879011.

It is a congruent number.

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, 47929 + ... + 48568.

Almost surely, 2^30879040 is an apocalyptic number.

It is an amenable number.

30879040 is an abundant number, since it is smaller than the sum of its proper divisors (42652436).

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

30879040 is an equidigital number, since it uses as much as digits as its factorization.

30879040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96514 (or 96504 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 30879040 is about 5556.8912172185. The cubic root of 30879040 is about 313.7289505092.

The spelling of 30879040 in words is "thirty million, eight hundred seventy-nine thousand, forty".