87699420 has 36 divisors (see below), whose sum is σ = 266022120. Its totient is φ = 23386464.

The previous prime is 87699397. The next prime is 87699427. The reversal of 87699420 is 2499678.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87699427) 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, 243430 + ... + 243789.

Almost surely, 2^87699420 is an apocalyptic number.

It is an amenable number.

87699420 is an abundant number, since it is smaller than the sum of its proper divisors (178322700).

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

87699420 is a wasteful number, since it uses less digits than its factorization.

87699420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487234 (or 487229 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 87699420 is about 9364.7968477698. The cubic root of 87699420 is about 444.2890131952.

The spelling of 87699420 in words is "eighty-seven million, six hundred ninety-nine thousand, four hundred twenty".