307445940 has 36 divisors (see below), whose sum is σ = 932586564. Its totient is φ = 81985536.

The previous prime is 307445933. The next prime is 307445953. The reversal of 307445940 is 49544703.

It can be written as a sum of positive squares in 2 ways, for example, as 56160036 + 251285904 = 7494^2 + 15852^2 .

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 a junction number, because it is equal to n+sod(n) for n = 307445895 and 307445904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 853837 + ... + 854196.

Almost surely, 2^307445940 is an apocalyptic number.

307445940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

307445940 is an abundant number, since it is smaller than the sum of its proper divisors (625140624).

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

307445940 is a wasteful number, since it uses less digits than its factorization.

307445940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708048 (or 1708043 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 307445940 is about 17534.1364201377. The cubic root of 307445940 is about 674.9261482988.

The spelling of 307445940 in words is "three hundred seven million, four hundred forty-five thousand, nine hundred forty".