87492990 has 48 divisors (see below), whose sum is σ = 227391408. Its totient is φ = 21535488.

The previous prime is 87492973. The next prime is 87492997. The reversal of 87492990 is 9929478.

It is a happy number.

It is a super-3 number, since 3×87492990³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87492997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3559 + ... + 13698.

It is an arithmetic number, because the mean of its divisors is an integer number (4737321).

Almost surely, 2^87492990 is an apocalyptic number.

87492990 is an abundant number, since it is smaller than the sum of its proper divisors (139898418).

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

87492990 is a wasteful number, since it uses less digits than its factorization.

87492990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17293 (or 17280 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 87492990 is about 9353.7687591687. The cubic root of 87492990 is about 443.9401449222.

The spelling of 87492990 in words is "eighty-seven million, four hundred ninety-two thousand, nine hundred ninety".