1890352638 has 48 divisors (see below), whose sum is σ = 4341342096. Its totient is φ = 592416000.

The previous prime is 1890352571. The next prime is 1890352649. The reversal of 1890352638 is 8362530981.

It is a happy number.

1890352638 is a `hidden beast` number, since 1 + 8 + 9 + 0 + 3 + 5 + 2 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1890352593 and 1890352602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 340888 + ... + 346388.

It is an arithmetic number, because the mean of its divisors is an integer number (90444627).

Almost surely, 2^1890352638 is an apocalyptic number.

1890352638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1890352638 is an abundant number, since it is smaller than the sum of its proper divisors (2450989458).

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

1890352638 is a wasteful number, since it uses less digits than its factorization.

1890352638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649 (or 6646 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1890352638 is about 43478.1857717178. The cubic root of 1890352638 is about 1236.4624804943.

The spelling of 1890352638 in words is "one billion, eight hundred ninety million, three hundred fifty-two thousand, six hundred thirty-eight".