307145772 has 36 divisors (see below), whose sum is σ = 810154800. Its totient is φ = 97930272.

The previous prime is 307145767. The next prime is 307145779. The reversal of 307145772 is 277541703.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (307145779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184647 + ... + 186302.

It is an arithmetic number, because the mean of its divisors is an integer number (22504300).

Almost surely, 2^307145772 is an apocalyptic number.

It is an amenable number.

307145772 is an abundant number, since it is smaller than the sum of its proper divisors (503009028).

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

307145772 is a wasteful number, since it uses less digits than its factorization.

307145772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370982 (or 370977 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 307145772 is about 17525.5747979916. The cubic root of 307145772 is about 674.7064270694.

The spelling of 307145772 in words is "three hundred seven million, one hundred forty-five thousand, seven hundred seventy-two".