84649980 has 24 divisors (see below), whose sum is σ = 237020112. Its totient is φ = 22573312.

The previous prime is 84649979. The next prime is 84650003. The reversal of 84649980 is 8994648.

It is a super-2 number, since 2×84649980² = 14331238228000800, 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 7 ways as a sum of consecutive naturals, for example, 705357 + ... + 705476.

It is an arithmetic number, because the mean of its divisors is an integer number (9875838).

Almost surely, 2^84649980 is an apocalyptic number.

It is an amenable number.

84649980 is an abundant number, since it is smaller than the sum of its proper divisors (152370132).

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

84649980 is a wasteful number, since it uses less digits than its factorization.

84649980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410845 (or 1410843 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 84649980 is about 9200.5423753168. The cubic root of 84649980 is about 439.0786159955.

The spelling of 84649980 in words is "eighty-four million, six hundred forty-nine thousand, nine hundred eighty".