30979025 has 72 divisors (see below), whose sum is σ = 51737760. Its totient is φ = 18295200.

The previous prime is 30979019. The next prime is 30979051. The reversal of 30979025 is 52097903.

30979025 = 771² + 772² + ... + 819².

It is not a de Polignac number, because 30979025 - 2¹⁶ = 30913489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1630466 + ... + 1630484.

It is an arithmetic number, because the mean of its divisors is an integer number (718580).

Almost surely, 2^30979025 is an apocalyptic number.

30979025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30979025 is a deficient number, since it is larger than the sum of its proper divisors (20758735).

30979025 is a wasteful number, since it uses less digits than its factorization.

30979025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 30979025 is about 5565.8804334984. The cubic root of 30979025 is about 314.0671992977.

30979025 divided by its sum of digits (35) gives a triangular number (885115 = T₁₃₃₀).

The spelling of 30979025 in words is "thirty million, nine hundred seventy-nine thousand, twenty-five".