2170357980 has 72 divisors (see below), whose sum is σ = 7069175568. Its totient is φ = 496081152.

The previous prime is 2170357967. The next prime is 2170358017. The reversal of 2170357980 is 897530712.

It is a super-2 number, since 2×2170357980² = 9420907522699360800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366169 + ... + 372048.

It is an arithmetic number, because the mean of its divisors is an integer number (98182994).

Almost surely, 2^2170357980 is an apocalyptic number.

2170357980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2170357980 is an abundant number, since it is smaller than the sum of its proper divisors (4898817588).

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

2170357980 is a wasteful number, since it uses less digits than its factorization.

2170357980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738243 (or 738234 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 2170357980 is about 46587.1010044626. The cubic root of 2170357980 is about 1294.7237784374.

The spelling of 2170357980 in words is "two billion, one hundred seventy million, three hundred fifty-seven thousand, nine hundred eighty".