87151974 has 128 divisors (see below), whose sum is σ = 233963520. Its totient is φ = 20995200.

The previous prime is 87151973. The next prime is 87151997. The reversal of 87151974 is 47915178.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87151973) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 321459 + ... + 321729.

It is an arithmetic number, because the mean of its divisors is an integer number (1827840).

Almost surely, 2^87151974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87151974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116981760).

87151974 is an abundant number, since it is smaller than the sum of its proper divisors (146811546).

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

87151974 is a wasteful number, since it uses less digits than its factorization.

87151974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346.

The product of its digits is 70560, while the sum is 42.

The square root of 87151974 is about 9335.5221600080. The cubic root of 87151974 is about 443.3626212898.

The spelling of 87151974 in words is "eighty-seven million, one hundred fifty-one thousand, nine hundred seventy-four".