988224157440 has 1296 divisors, whose sum is σ = 4036047226848. Its totient is φ = 230111870976.

The previous prime is 988224157429. The next prime is 988224157451. The reversal of 988224157440 is 44751422889.

988224157440 is a `hidden beast` number, since 9 + 8 + 8 + 2 + 24 + 1 + 574 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (988224157429) and next prime (988224157451).

It is a tau number, because it is divible by the number of its divisors (1296).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1459710382 + ... + 1459711058.

Almost surely, 2^988224157440 is an apocalyptic number.

988224157440 is a gapful number since it is divisible by the number (90) 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 988224157440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2018023613424).

988224157440 is an abundant number, since it is smaller than the sum of its proper divisors (3047823069408).

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

988224157440 is a wasteful number, since it uses less digits than its factorization.

988224157440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 988224157440 in words is "nine hundred eighty-eight billion, two hundred twenty-four million, one hundred fifty-seven thousand, four hundred forty".