1894892220 has 216 divisors, whose sum is σ = 6278047776. Its totient is φ = 462398976.

The previous prime is 1894892201. The next prime is 1894892243. The reversal of 1894892220 is 222984981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5079954 + ... + 5080326.

It is an arithmetic number, because the mean of its divisors is an integer number (29065036).

Almost surely, 2^1894892220 is an apocalyptic number.

1894892220 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 1894892220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3139023888).

1894892220 is an abundant number, since it is smaller than the sum of its proper divisors (4383155556).

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

1894892220 is a wasteful number, since it uses less digits than its factorization.

1894892220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1894892220 is about 43530.3597504087. The cubic root of 1894892220 is about 1237.4514557021.

The spelling of 1894892220 in words is "one billion, eight hundred ninety-four million, eight hundred ninety-two thousand, two hundred twenty".