30723891552 has 72 divisors (see below), whose sum is σ = 87686713296. Its totient is φ = 10204298496.

The previous prime is 30723891547. The next prime is 30723891553. The reversal of 30723891552 is 25519832703.

30723891552 is a `hidden beast` number, since 3 + 0 + 7 + 2 + 3 + 8 + 91 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 30723891498 and 30723891507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30723891553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112788 + ... + 272339.

It is an arithmetic number, because the mean of its divisors is an integer number (1217871018).

Almost surely, 2^30723891552 is an apocalyptic number.

30723891552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30723891552 is an abundant number, since it is smaller than the sum of its proper divisors (56962821744).

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

30723891552 is a wasteful number, since it uses less digits than its factorization.

30723891552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385420 (or 385409 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 30723891552 in words is "thirty billion, seven hundred twenty-three million, eight hundred ninety-one thousand, five hundred fifty-two".