30877680 has 40 divisors (see below), whose sum is σ = 95721552. Its totient is φ = 8233984.

The previous prime is 30877669. The next prime is 30877681. The reversal of 30877680 is 8677803.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30877680² = 1906862244364800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30877681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64089 + ... + 64568.

Almost surely, 2^30877680 is an apocalyptic number.

30877680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30877680 is an abundant number, since it is smaller than the sum of its proper divisors (64843872).

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

30877680 is a wasteful number, since it uses less digits than its factorization.

30877680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128673 (or 128667 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 30877680 is about 5556.7688452913. The cubic root of 30877680 is about 313.7243446057.

The spelling of 30877680 in words is "thirty million, eight hundred seventy-seven thousand, six hundred eighty".