87291954 has 48 divisors (see below), whose sum is σ = 197989272. Its totient is φ = 27765504.

The previous prime is 87291937. The next prime is 87291959. The reversal of 87291954 is 45919278.

It can be written as a sum of positive squares in 4 ways, for example, as 86769225 + 522729 = 9315^2 + 723^2 .

It is not an unprimeable number, because it can be changed into a prime (87291959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34062 + ... + 36534.

Almost surely, 2^87291954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87291954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98994636).

87291954 is an abundant number, since it is smaller than the sum of its proper divisors (110697318).

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

87291954 is a wasteful number, since it uses less digits than its factorization.

87291954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571 (or 2568 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 87291954 is about 9343.0163223661. The cubic root of 87291954 is about 443.5998647294.

The spelling of 87291954 in words is "eighty-seven million, two hundred ninety-one thousand, nine hundred fifty-four".