1990332525 has 24 divisors (see below), whose sum is σ = 3396838144. Its totient is φ = 1027267200.

The previous prime is 1990332503. The next prime is 1990332541. The reversal of 1990332525 is 5252330991.

It is a happy number.

It is not a de Polignac number, because 1990332525 - 2¹³ = 1990324333 is a prime.

It is a super-2 number, since 2×1990332525² = 7922847120145751250, 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 23 ways as a sum of consecutive naturals, for example, 425704 + ... + 430353.

Almost surely, 2^1990332525 is an apocalyptic number.

1990332525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1990332525 is a deficient number, since it is larger than the sum of its proper divisors (1406505619).

1990332525 is a wasteful number, since it uses less digits than its factorization.

1990332525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856101 (or 856096 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 39.

The square root of 1990332525 is about 44613.1429625845. The cubic root of 1990332525 is about 1257.8877276432.

The spelling of 1990332525 in words is "one billion, nine hundred ninety million, three hundred thirty-two thousand, five hundred twenty-five".