87473347920 has 480 divisors, whose sum is σ = 355161411072. Its totient is φ = 18860802048.

The previous prime is 87473347877. The next prime is 87473347991. The reversal of 87473347920 is 2974337478.

87473347920 is a `hidden beast` number, since 87 + 4 + 73 + 3 + 479 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8456992 + ... + 8467328.

Almost surely, 2^87473347920 is an apocalyptic number.

87473347920 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 87473347920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177580705536).

87473347920 is an abundant number, since it is smaller than the sum of its proper divisors (267688063152).

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

87473347920 is a wasteful number, since it uses less digits than its factorization.

87473347920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10459 (or 10450 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 87473347920 in words is "eighty-seven billion, four hundred seventy-three million, three hundred forty-seven thousand, nine hundred twenty".