87731430 has 64 divisors (see below), whose sum is σ = 223948800. Its totient is φ = 21946496.

The previous prime is 87731419. The next prime is 87731437. The reversal of 87731430 is 3413778.

It is a junction number, because it is equal to n+sod(n) for n = 87731391 and 87731400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87731437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35371 + ... + 37769.

It is an arithmetic number, because the mean of its divisors is an integer number (3499200).

Almost surely, 2^87731430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87731430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111974400).

87731430 is an abundant number, since it is smaller than the sum of its proper divisors (136217370).

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

87731430 is a wasteful number, since it uses less digits than its factorization.

87731430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 87731430 is about 9366.5057518799. The cubic root of 87731430 is about 444.3430612963.

The spelling of 87731430 in words is "eighty-seven million, seven hundred thirty-one thousand, four hundred thirty".