1994999520 has 48 divisors (see below), whose sum is σ = 6284250000. Its totient is φ = 531999744.

The previous prime is 1994999473. The next prime is 1994999551. The reversal of 1994999520 is 259994991.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2077645 + ... + 2078604.

It is an arithmetic number, because the mean of its divisors is an integer number (130921875).

Almost surely, 2^1994999520 is an apocalyptic number.

1994999520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1994999520 is an abundant number, since it is smaller than the sum of its proper divisors (4289250480).

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

1994999520 is a wasteful number, since it uses less digits than its factorization.

1994999520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156267 (or 4156259 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 57.

The square root of 1994999520 is about 44665.4174949703. The cubic root of 1994999520 is about 1258.8701385622.

The spelling of 1994999520 in words is "one billion, nine hundred ninety-four million, nine hundred ninety-nine thousand, five hundred twenty".