1490533840 has 80 divisors (see below), whose sum is σ = 3543523200. Its totient is φ = 582872576.

The previous prime is 1490533829. The next prime is 1490533873. The reversal of 1490533840 is 483350941.

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

It is a super-2 number, since 2×1490533840² = 4443382256370291200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1490533840.

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, 1776141 + ... + 1776979.

It is an arithmetic number, because the mean of its divisors is an integer number (44294040).

Almost surely, 2^1490533840 is an apocalyptic number.

1490533840 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 1490533840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771761600).

1490533840 is an abundant number, since it is smaller than the sum of its proper divisors (2052989360).

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

1490533840 is a wasteful number, since it uses less digits than its factorization.

1490533840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1490533840 is about 38607.4324450617. The cubic root of 1490533840 is about 1142.3011485435.

The spelling of 1490533840 in words is "one billion, four hundred ninety million, five hundred thirty-three thousand, eight hundred forty".