84356980 has 12 divisors (see below), whose sum is σ = 177149700. Its totient is φ = 33742784.

The previous prime is 84356977. The next prime is 84357001. The reversal of 84356980 is 8965348.

It can be written as a sum of positive squares in 2 ways, for example, as 24820324 + 59536656 = 4982^2 + 7716^2 .

It is a super-2 number, since 2×84356980² = 14232200149440800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2108905 + ... + 2108944.

It is an arithmetic number, because the mean of its divisors is an integer number (14762475).

Almost surely, 2^84356980 is an apocalyptic number.

It is an amenable number.

84356980 is an abundant number, since it is smaller than the sum of its proper divisors (92792720).

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

84356980 is a wasteful number, since it uses less digits than its factorization.

84356980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217858 (or 4217856 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 84356980 is about 9184.6055985001. The cubic root of 84356980 is about 438.5714343312.

The spelling of 84356980 in words is "eighty-four million, three hundred fifty-six thousand, nine hundred eighty".