84151890 has 24 divisors (see below), whose sum is σ = 218795148. Its totient is φ = 22440480.

The previous prime is 84151889. The next prime is 84151897. The reversal of 84151890 is 9815148.

It can be written as a sum of positive squares in 2 ways, for example, as 81595089 + 2556801 = 9033^2 + 1599^2 .

It is not an unprimeable number, because it can be changed into a prime (84151897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 467421 + ... + 467600.

Almost surely, 2^84151890 is an apocalyptic number.

84151890 is an abundant number, since it is smaller than the sum of its proper divisors (134643258).

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

84151890 is a wasteful number, since it uses less digits than its factorization.

84151890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935034 (or 935031 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 84151890 is about 9173.4339262895. The cubic root of 84151890 is about 438.2157253459.

The spelling of 84151890 in words is "eighty-four million, one hundred fifty-one thousand, eight hundred ninety".