87449990 has 16 divisors (see below), whose sum is σ = 159628320. Its totient is φ = 34487040.

The previous prime is 87449963. The next prime is 87450001. The reversal of 87449990 is 9994478.

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, 60875 + ... + 62294.

It is an arithmetic number, because the mean of its divisors is an integer number (9976770).

Almost surely, 2^87449990 is an apocalyptic number.

87449990 is a deficient number, since it is larger than the sum of its proper divisors (72178330).

87449990 is a wasteful number, since it uses less digits than its factorization.

87449990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123247.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 87449990 is about 9351.4699379295. The cubic root of 87449990 is about 443.8674055543.

The spelling of 87449990 in words is "eighty-seven million, four hundred forty-nine thousand, nine hundred ninety".