612642090 has 128 divisors (see below), whose sum is σ = 1618589952. Its totient is φ = 147783680.

The previous prime is 612642059. The next prime is 612642109. The reversal of 612642090 is 90246216.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1735354 + ... + 1735706.

It is an arithmetic number, because the mean of its divisors is an integer number (12645234).

Almost surely, 2^612642090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612642090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809294976).

612642090 is an abundant number, since it is smaller than the sum of its proper divisors (1005947862).

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

612642090 is a wasteful number, since it uses less digits than its factorization.

612642090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 612642090 is about 24751.6078265635. The cubic root of 612642090 is about 849.3152917260.

The spelling of 612642090 in words is "six hundred twelve million, six hundred forty-two thousand, ninety".