87469920 has 288 divisors, whose sum is σ = 330220800. Its totient is φ = 20984832.

The previous prime is 87469903. The next prime is 87469927. The reversal of 87469920 is 2996478.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87469927) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 629211 + ... + 629349.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^87469920 is an apocalyptic number.

87469920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87469920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165110400).

87469920 is an abundant number, since it is smaller than the sum of its proper divisors (242750880).

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

87469920 is a wasteful number, since it uses less digits than its factorization.

87469920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 87469920 is about 9352.5354850971. The cubic root of 87469920 is about 443.9011223695.

The spelling of 87469920 in words is "eighty-seven million, four hundred sixty-nine thousand, nine hundred twenty".