1990524657 has 48 divisors (see below), whose sum is σ = 2995755840. Its totient is φ = 1174293120.

The previous prime is 1990524647. The next prime is 1990524659. The reversal of 1990524657 is 7564250991.

It is not a de Polignac number, because 1990524657 - 2²³ = 1982136049 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1990524659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3020194 + ... + 3020852.

It is an arithmetic number, because the mean of its divisors is an integer number (62411580).

Almost surely, 2^1990524657 is an apocalyptic number.

It is an amenable number.

1990524657 is a deficient number, since it is larger than the sum of its proper divisors (1005231183).

1990524657 is a wasteful number, since it uses less digits than its factorization.

1990524657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 48.

The square root of 1990524657 is about 44615.2962222599. The cubic root of 1990524657 is about 1257.9282020707.

The spelling of 1990524657 in words is "one billion, nine hundred ninety million, five hundred twenty-four thousand, six hundred fifty-seven".