102615620 has 24 divisors (see below), whose sum is σ = 220750488. Its totient is φ = 40044800.

The previous prime is 102615613. The next prime is 102615629. The reversal of 102615620 is 26516201.

It can be written as a sum of positive squares in 4 ways, for example, as 322624 + 102292996 = 568^2 + 10114^2 .

It is not an unprimeable number, because it can be changed into a prime (102615629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61751 + ... + 63390.

It is an arithmetic number, because the mean of its divisors is an integer number (9197937).

Almost surely, 2^102615620 is an apocalyptic number.

102615620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102615620 is an abundant number, since it is smaller than the sum of its proper divisors (118134868).

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

102615620 is a wasteful number, since it uses less digits than its factorization.

102615620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125191 (or 125189 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 102615620 is about 10129.9368211258. The cubic root of 102615620 is about 468.1709811857.

The spelling of 102615620 in words is "one hundred two million, six hundred fifteen thousand, six hundred twenty".