1988820294 has 32 divisors (see below), whose sum is σ = 4032099456. Its totient is φ = 653909760.

The previous prime is 1988820287. The next prime is 1988820311. The reversal of 1988820294 is 4920288891.

It is a happy number.

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, 173109 + ... + 184239.

It is an arithmetic number, because the mean of its divisors is an integer number (126003108).

Almost surely, 2^1988820294 is an apocalyptic number.

1988820294 is an abundant number, since it is smaller than the sum of its proper divisors (2043279162).

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

1988820294 is a wasteful number, since it uses less digits than its factorization.

1988820294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11540.

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 1988820294 is about 44596.1914741607. The cubic root of 1988820294 is about 1257.5690708767.

The spelling of 1988820294 in words is "one billion, nine hundred eighty-eight million, eight hundred twenty thousand, two hundred ninety-four".