87473720 has 64 divisors (see below), whose sum is σ = 208656000. Its totient is φ = 32911488.

The previous prime is 87473719. The next prime is 87473759. The reversal of 87473720 is 2737478.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135719 + ... + 136361.

It is an arithmetic number, because the mean of its divisors is an integer number (3260250).

Almost surely, 2^87473720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87473720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104328000).

87473720 is an abundant number, since it is smaller than the sum of its proper divisors (121182280).

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

87473720 is a wasteful number, since it uses less digits than its factorization.

87473720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 87473720 is about 9352.7386363567. The cubic root of 87473720 is about 443.9075504834.

The spelling of 87473720 in words is "eighty-seven million, four hundred seventy-three thousand, seven hundred twenty".