1081854900 has 144 divisors (see below), whose sum is σ = 3974884480. Its totient is φ = 247276800.

The previous prime is 1081854899. The next prime is 1081854911. The reversal of 1081854900 is 94581801.

1081854900 is a `hidden beast` number, since 10 + 81 + 85 + 490 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 47 ways as a sum of consecutive naturals, for example, 9721 + ... + 47520.

Almost surely, 2^1081854900 is an apocalyptic number.

1081854900 is a gapful number since it is divisible by the number (10) 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 1081854900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987442240).

1081854900 is an abundant number, since it is smaller than the sum of its proper divisors (2893029580).

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

1081854900 is a wasteful number, since it uses less digits than its factorization.

1081854900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57271 (or 57258 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1081854900 is about 32891.5627479145. The cubic root of 1081854900 is about 1026.5726087910.

The spelling of 1081854900 in words is "one billion, eighty-one million, eight hundred fifty-four thousand, nine hundred".