916201980 has 72 divisors (see below), whose sum is σ = 2783180400. Its totient is φ = 243965952.

The previous prime is 916201943. The next prime is 916201999. The reversal of 916201980 is 89102619.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135111 + ... + 141729.

Almost surely, 2^916201980 is an apocalyptic number.

916201980 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

916201980 is an abundant number, since it is smaller than the sum of its proper divisors (1866978420).

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

916201980 is a wasteful number, since it uses less digits than its factorization.

916201980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403 (or 7398 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 916201980 is about 30268.8285204433. The cubic root of 916201980 is about 971.2486064092.

The spelling of 916201980 in words is "nine hundred sixteen million, two hundred one thousand, nine hundred eighty".