30977345 has 16 divisors (see below), whose sum is σ = 43521408. Its totient is φ = 20722560.

The previous prime is 30977333. The next prime is 30977347. The reversal of 30977345 is 54377903.

It is a de Polignac number, because none of the positive numbers 2^k-30977345 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30977299 and 30977308.

It is not an unprimeable number, because it can be changed into a prime (30977347) 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, 9359 + ... + 12228.

It is an arithmetic number, because the mean of its divisors is an integer number (2720088).

Almost surely, 2^30977345 is an apocalyptic number.

30977345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30977345 is a deficient number, since it is larger than the sum of its proper divisors (12544063).

30977345 is a wasteful number, since it uses less digits than its factorization.

30977345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21640.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 30977345 is about 5565.7295119328. The cubic root of 30977345 is about 314.0615218817.

The spelling of 30977345 in words is "thirty million, nine hundred seventy-seven thousand, three hundred forty-five".