151998990 has 96 divisors (see below), whose sum is σ = 431954208. Its totient is φ = 34003200.

The previous prime is 151998953. The next prime is 151998991. The reversal of 151998990 is 99899151.

It is a super-2 number, since 2×151998990² = 46207385922040200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151998991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45580 + ... + 48800.

It is an arithmetic number, because the mean of its divisors is an integer number (4499523).

Almost surely, 2^151998990 is an apocalyptic number.

151998990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 151998990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215977104).

151998990 is an abundant number, since it is smaller than the sum of its proper divisors (279955218).

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

151998990 is a wasteful number, since it uses less digits than its factorization.

151998990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266 (or 3255 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 51.

The square root of 151998990 is about 12328.7870449611. The cubic root of 151998990 is about 533.6791476867.

The spelling of 151998990 in words is "one hundred fifty-one million, nine hundred ninety-eight thousand, nine hundred ninety".