30780970 has 32 divisors (see below), whose sum is σ = 60673536. Its totient is φ = 11150400.

The previous prime is 30780943. The next prime is 30780979. The reversal of 30780970 is 7908703.

It is a super-2 number, since 2×30780970² = 1894936228281800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30780979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50407 + ... + 51013.

It is an arithmetic number, because the mean of its divisors is an integer number (1896048).

Almost surely, 2^30780970 is an apocalyptic number.

30780970 is a deficient number, since it is larger than the sum of its proper divisors (29892566).

30780970 is a wasteful number, since it uses less digits than its factorization.

30780970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 30780970 is about 5548.0600213047. The cubic root of 30780970 is about 313.3964700999.

The spelling of 30780970 in words is "thirty million, seven hundred eighty thousand, nine hundred seventy".