30979140 has 24 divisors (see below), whose sum is σ = 86741760. Its totient is φ = 8261088.

The previous prime is 30979133. The next prime is 30979147. The reversal of 30979140 is 4197903.

It is an interprime number because it is at equal distance from previous prime (30979133) and next prime (30979147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30979147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258100 + ... + 258219.

It is an arithmetic number, because the mean of its divisors is an integer number (3614240).

Almost surely, 2^30979140 is an apocalyptic number.

30979140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30979140 is an abundant number, since it is smaller than the sum of its proper divisors (55762620).

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

30979140 is a wasteful number, since it uses less digits than its factorization.

30979140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516331 (or 516329 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 30979140 is about 5565.8907642892. The cubic root of 30979140 is about 314.0675879228.

The spelling of 30979140 in words is "thirty million, nine hundred seventy-nine thousand, one hundred forty".