308540961 has 16 divisors (see below), whose sum is σ = 461627520. Its totient is φ = 203655600.

The previous prime is 308540933. The next prime is 308540971. The reversal of 308540961 is 169045803.

It is not a de Polignac number, because 308540961 - 2¹⁴ = 308524577 is a prime.

It is a super-2 number, since 2×308540961² = 190395049229607042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (308540971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53845 + ... + 59298.

It is an arithmetic number, because the mean of its divisors is an integer number (28851720).

Almost surely, 2^308540961 is an apocalyptic number.

It is an amenable number.

308540961 is a deficient number, since it is larger than the sum of its proper divisors (153086559).

308540961 is a wasteful number, since it uses less digits than its factorization.

308540961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113253 (or 113247 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 308540961 is about 17565.3340702646. The cubic root of 308540961 is about 675.7264869541.

The spelling of 308540961 in words is "three hundred eight million, five hundred forty thousand, nine hundred sixty-one".