1836390864 has 240 divisors, whose sum is σ = 6312345984. Its totient is φ = 448757760.

The previous prime is 1836390859. The next prime is 1836390887. The reversal of 1836390864 is 4680936381.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 689824 + ... + 692480.

Almost surely, 2^1836390864 is an apocalyptic number.

1836390864 is a gapful number since it is divisible by the number (14) 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 1836390864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3156172992).

1836390864 is an abundant number, since it is smaller than the sum of its proper divisors (4475955120).

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

1836390864 is a wasteful number, since it uses less digits than its factorization.

1836390864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1836390864 is about 42853.1313208265. The cubic root of 1836390864 is about 1224.5834183116.

The spelling of 1836390864 in words is "one billion, eight hundred thirty-six million, three hundred ninety thousand, eight hundred sixty-four".