8151990 has 64 divisors (see below), whose sum is σ = 24399360. Its totient is φ = 1693440.

The previous prime is 8151967. The next prime is 8151991. The reversal of 8151990 is 991518.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8151991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 546 + ... + 4074.

It is an arithmetic number, because the mean of its divisors is an integer number (381240).

Almost surely, 2^8151990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8151990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12199680).

8151990 is an abundant number, since it is smaller than the sum of its proper divisors (16247370).

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

8151990 is a wasteful number, since it uses less digits than its factorization.

8151990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 8151990 is about 2855.1689967496. The cubic root of 8151990 is about 201.2586457713.

The spelling of 8151990 in words is "eight million, one hundred fifty-one thousand, nine hundred ninety".