612908388 has 72 divisors (see below), whose sum is σ = 1636951680. Its totient is φ = 193045440.

The previous prime is 612908381. The next prime is 612908411. The reversal of 612908388 is 883809216.

It is not an unprimeable number, because it can be changed into a prime (612908381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42823 + ... + 55313.

It is an arithmetic number, because the mean of its divisors is an integer number (22735440).

Almost surely, 2^612908388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612908388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818475840).

612908388 is an abundant number, since it is smaller than the sum of its proper divisors (1024043292).

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

612908388 is a wasteful number, since it uses less digits than its factorization.

612908388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12577 (or 12572 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 612908388 is about 24756.9866502367. The cubic root of 612908388 is about 849.4383315918.

The spelling of 612908388 in words is "six hundred twelve million, nine hundred eight thousand, three hundred eighty-eight".