30697980 has 24 divisors (see below), whose sum is σ = 85954512. Its totient is φ = 8186112.

The previous prime is 30697951. The next prime is 30697987. The reversal of 30697980 is 8979603.

It is a happy number.

30697980 is nontrivially palindromic in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30697987) 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, 255757 + ... + 255876.

It is an arithmetic number, because the mean of its divisors is an integer number (3581438).

Almost surely, 2^30697980 is an apocalyptic number.

30697980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30697980 is an abundant number, since it is smaller than the sum of its proper divisors (55256532).

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

30697980 is a wasteful number, since it uses less digits than its factorization.

30697980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511645 (or 511643 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 30697980 is about 5540.5757823533. The cubic root of 30697980 is about 313.1145623431.

The spelling of 30697980 in words is "thirty million, six hundred ninety-seven thousand, nine hundred eighty".