30770940 has 24 divisors (see below), whose sum is σ = 86158800. Its totient is φ = 8205568.

The previous prime is 30770933. The next prime is 30770989. The reversal of 30770940 is 4907703.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30770898 and 30770907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256365 + ... + 256484.

It is an arithmetic number, because the mean of its divisors is an integer number (3589950).

Almost surely, 2^30770940 is an apocalyptic number.

30770940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30770940 is an abundant number, since it is smaller than the sum of its proper divisors (55387860).

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

30770940 is a wasteful number, since it uses less digits than its factorization.

30770940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512861 (or 512859 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 30770940 is about 5547.1560280922. The cubic root of 30770940 is about 313.3624262509.

The spelling of 30770940 in words is "thirty million, seven hundred seventy thousand, nine hundred forty".