1900533840 has 80 divisors (see below), whose sum is σ = 5913597696. Its totient is φ = 504921600.

The previous prime is 1900533839. The next prime is 1900533911. The reversal of 1900533840 is 483350091.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1900533840² = 7224057753970291200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50430 + ... + 79650.

Almost surely, 2^1900533840 is an apocalyptic number.

1900533840 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 1900533840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2956798848).

1900533840 is an abundant number, since it is smaller than the sum of its proper divisors (4013063856).

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

1900533840 is a wasteful number, since it uses less digits than its factorization.

1900533840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29508 (or 29502 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1900533840 is about 43595.1125701035. The cubic root of 1900533840 is about 1238.6783177352.

The spelling of 1900533840 in words is "one billion, nine hundred million, five hundred thirty-three thousand, eight hundred forty".