87490040 has 32 divisors (see below), whose sum is σ = 214749360. Its totient is φ = 31814400.

The previous prime is 87490031. The next prime is 87490057. The reversal of 87490040 is 4009478.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 87489979 and 87490006.

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, 98981 + ... + 99860.

Almost surely, 2^87490040 is an apocalyptic number.

It is an amenable number.

87490040 is an abundant number, since it is smaller than the sum of its proper divisors (127259320).

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

87490040 is a wasteful number, since it uses less digits than its factorization.

87490040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198863 (or 198859 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 87490040 is about 9353.6110673900. The cubic root of 87490040 is about 443.9351554248.

The spelling of 87490040 in words is "eighty-seven million, four hundred ninety thousand, forty".