918032081400 has 432 divisors, whose sum is σ = 3719253905640. Its totient is φ = 209835360000.

The previous prime is 918032081381. The next prime is 918032081479. The reversal of 918032081400 is 4180230819.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2188650 + ... + 2574150.

Almost surely, 2^918032081400 is an apocalyptic number.

918032081400 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 918032081400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1859626952820).

918032081400 is an abundant number, since it is smaller than the sum of its proper divisors (2801221824240).

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

918032081400 is a wasteful number, since it uses less digits than its factorization.

918032081400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385546 (or 385518 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 918032081400 in words is "nine hundred eighteen billion, thirty-two million, eighty-one thousand, four hundred".