87404436 has 54 divisors (see below), whose sum is σ = 257015850. Its totient is φ = 24972192.

The previous prime is 87404431. The next prime is 87404437. The reversal of 87404436 is 63440478.

It can be written as a sum of positive squares in only one way, i.e., 83832336 + 3572100 = 9156^2 + 1890^2 .

It is a super-3 number, since 3×87404436³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 87404436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87404431) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23011 + ... + 26538.

Almost surely, 2^87404436 is an apocalyptic number.

It is an amenable number.

87404436 is an abundant number, since it is smaller than the sum of its proper divisors (169611414).

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

87404436 is a wasteful number, since it uses less digits than its factorization.

87404436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49573 (or 49561 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 87404436 is about 9349.0339607897. The cubic root of 87404436 is about 443.7903197907.

The spelling of 87404436 in words is "eighty-seven million, four hundred four thousand, four hundred thirty-six".