84145990 has 16 divisors (see below), whose sum is σ = 151744752. Its totient is φ = 33595744.

The previous prime is 84145951. The next prime is 84146011. The reversal of 84145990 is 9954148.

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, 1984 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (9484047).

Almost surely, 2^84145990 is an apocalyptic number.

84145990 is a deficient number, since it is larger than the sum of its proper divisors (67598762).

84145990 is a wasteful number, since it uses less digits than its factorization.

84145990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15671.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 84145990 is about 9173.1123398768. The cubic root of 84145990 is about 438.2054838124.

The spelling of 84145990 in words is "eighty-four million, one hundred forty-five thousand, nine hundred ninety".