30812397 has 16 divisors (see below), whose sum is σ = 51220992. Its totient is φ = 16006320.

The previous prime is 30812393. The next prime is 30812399. The reversal of 30812397 is 79321803.

It is not a de Polignac number, because 30812397 - 2² = 30812393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30812393) 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, 66463 + ... + 66924.

It is an arithmetic number, because the mean of its divisors is an integer number (3201312).

Almost surely, 2^30812397 is an apocalyptic number.

It is an amenable number.

30812397 is a deficient number, since it is larger than the sum of its proper divisors (20408595).

30812397 is a wasteful number, since it uses less digits than its factorization.

30812397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133408.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 30812397 is about 5550.8915500125. The cubic root of 30812397 is about 313.5030918299.

The spelling of 30812397 in words is "thirty million, eight hundred twelve thousand, three hundred ninety-seven".