1612291620 has 24 divisors (see below), whose sum is σ = 4514416704. Its totient is φ = 429944416.

The previous prime is 1612291591. The next prime is 1612291633. The reversal of 1612291620 is 261922161.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13435704 + ... + 13435823.

It is an arithmetic number, because the mean of its divisors is an integer number (188100696).

Almost surely, 2^1612291620 is an apocalyptic number.

1612291620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1612291620 is an abundant number, since it is smaller than the sum of its proper divisors (2902125084).

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

1612291620 is a wasteful number, since it uses less digits than its factorization.

1612291620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26871539 (or 26871537 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1612291620 is about 40153.3512922645. The cubic root of 1612291620 is about 1172.5945344406.

The spelling of 1612291620 in words is "one billion, six hundred twelve million, two hundred ninety-one thousand, six hundred twenty".