612633840 has 160 divisors (see below), whose sum is σ = 2337517056. Its totient is φ = 129254400.

The previous prime is 612633821. The next prime is 612633841. The reversal of 612633840 is 48336216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612633841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7815 + ... + 35865.

Almost surely, 2^612633840 is an apocalyptic number.

612633840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612633840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168758528).

612633840 is an abundant number, since it is smaller than the sum of its proper divisors (1724883216).

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

612633840 is a wasteful number, since it uses less digits than its factorization.

612633840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28087 (or 28081 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 612633840 is about 24751.4411701622. The cubic root of 612633840 is about 849.3114793410.

The spelling of 612633840 in words is "six hundred twelve million, six hundred thirty-three thousand, eight hundred forty".