1838656490 has 32 divisors (see below), whose sum is σ = 3615886656. Its totient is φ = 667596160.

The previous prime is 1838656489. The next prime is 1838656499. The reversal of 1838656490 is 946568381.

It is not an unprimeable number, because it can be changed into a prime (1838656499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62894 + ... + 87366.

It is an arithmetic number, because the mean of its divisors is an integer number (112996458).

Almost surely, 2^1838656490 is an apocalyptic number.

1838656490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1838656490 is a deficient number, since it is larger than the sum of its proper divisors (1777230166).

1838656490 is a wasteful number, since it uses less digits than its factorization.

1838656490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25174.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 1838656490 is about 42879.5579501468. The cubic root of 1838656490 is about 1225.0868165599.

The spelling of 1838656490 in words is "one billion, eight hundred thirty-eight million, six hundred fifty-six thousand, four hundred ninety".