84690090 has 64 divisors (see below), whose sum is σ = 239137920. Its totient is φ = 21254400.

The previous prime is 84690083. The next prime is 84690101. The reversal of 84690090 is 9009648.

It is a super-2 number, since 2×84690090² = 14344822688416200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4636 + ... + 13815.

It is an arithmetic number, because the mean of its divisors is an integer number (3736530).

Almost surely, 2^84690090 is an apocalyptic number.

84690090 is an abundant number, since it is smaller than the sum of its proper divisors (154447830).

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

84690090 is a wasteful number, since it uses less digits than its factorization.

84690090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18484 (or 18478 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 84690090 is about 9202.7218799657. The cubic root of 84690090 is about 439.1479551038.

The spelling of 84690090 in words is "eighty-four million, six hundred ninety thousand, ninety".