1620534244 has 48 divisors (see below), whose sum is σ = 3484293120. Its totient is φ = 643952160.

The previous prime is 1620534241. The next prime is 1620534277. The reversal of 1620534244 is 4424350261.

It is a super-2 number, since 2×1620534244² = 5252262471953303072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1620534241) 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, 7402 + ... + 57409.

It is an arithmetic number, because the mean of its divisors is an integer number (72589440).

Almost surely, 2^1620534244 is an apocalyptic number.

1620534244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1620534244 is an abundant number, since it is smaller than the sum of its proper divisors (1863758876).

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

1620534244 is a wasteful number, since it uses less digits than its factorization.

1620534244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64888 (or 64886 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1620534244 is about 40255.8597473709. The cubic root of 1620534244 is about 1174.5893827629.

The spelling of 1620534244 in words is "one billion, six hundred twenty million, five hundred thirty-four thousand, two hundred forty-four".