1896040440 has 128 divisors (see below), whose sum is σ = 7223040000. Its totient is φ = 433378944.

The previous prime is 1896040411. The next prime is 1896040451. The reversal of 1896040440 is 440406981.

It is a happy number.

1896040440 is a `hidden beast` number, since 1 + 8 + 9 + 604 + 0 + 4 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1896040395 and 1896040404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117840 + ... + 132959.

It is an arithmetic number, because the mean of its divisors is an integer number (56430000).

Almost surely, 2^1896040440 is an apocalyptic number.

1896040440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1896040440 is an abundant number, since it is smaller than the sum of its proper divisors (5326999560).

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

1896040440 is a wasteful number, since it uses less digits than its factorization.

1896040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250826 (or 250816 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1896040440 is about 43543.5464793579. The cubic root of 1896040440 is about 1237.7013519932.

The spelling of 1896040440 in words is "one billion, eight hundred ninety-six million, forty thousand, four hundred forty".