87799140 has 240 divisors, whose sum is σ = 324434880. Its totient is φ = 19595520.

The previous prime is 87799121. The next prime is 87799141. The reversal of 87799140 is 4199778.

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

It is not an unprimeable number, because it can be changed into a prime (87799141) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 231471 + ... + 231849.

It is an arithmetic number, because the mean of its divisors is an integer number (1351812).

Almost surely, 2^87799140 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 87799140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162217440).

87799140 is an abundant number, since it is smaller than the sum of its proper divisors (236635740).

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

87799140 is a wasteful number, since it uses less digits than its factorization.

87799140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 87799140 is about 9370.1195296538. The cubic root of 87799140 is about 444.4573446719.

The spelling of 87799140 in words is "eighty-seven million, seven hundred ninety-nine thousand, one hundred forty".