30764820 has 24 divisors (see below), whose sum is σ = 86141664. Its totient is φ = 8203936.

The previous prime is 30764809. The next prime is 30764821. The reversal of 30764820 is 2846703.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30764821) 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, 256314 + ... + 256433.

It is an arithmetic number, because the mean of its divisors is an integer number (3589236).

Almost surely, 2^30764820 is an apocalyptic number.

30764820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30764820 is an abundant number, since it is smaller than the sum of its proper divisors (55376844).

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

30764820 is a wasteful number, since it uses less digits than its factorization.

30764820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512759 (or 512757 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 30764820 is about 5546.6043666373. The cubic root of 30764820 is about 313.3416500986.

The spelling of 30764820 in words is "thirty million, seven hundred sixty-four thousand, eight hundred twenty".