308400745 has 8 divisors (see below), whose sum is σ = 371113920. Its totient is φ = 246031920.

The previous prime is 308400731. The next prime is 308400751. The reversal of 308400745 is 547004803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 308400745 - 2⁹ = 308400233 is a prime.

It is a super-2 number, since 2×308400745² = 190222039033110050, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 84111 + ... + 87700.

It is an arithmetic number, because the mean of its divisors is an integer number (46389240).

Almost surely, 2^308400745 is an apocalyptic number.

It is an amenable number.

308400745 is a deficient number, since it is larger than the sum of its proper divisors (62713175).

308400745 is a wasteful number, since it uses less digits than its factorization.

308400745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172175.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 308400745 is about 17561.3423461875. The cubic root of 308400745 is about 675.6241104646.

The spelling of 308400745 in words is "three hundred eight million, four hundred thousand, seven hundred forty-five".