1989120910 has 16 divisors (see below), whose sum is σ = 4091906016. Its totient is φ = 681984288.

The previous prime is 1989120901. The next prime is 1989120923. The reversal of 1989120910 is 190219891.

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, 14207937 + ... + 14208076.

It is an arithmetic number, because the mean of its divisors is an integer number (255744126).

Almost surely, 2^1989120910 is an apocalyptic number.

1989120910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989120910 is an abundant number, since it is smaller than the sum of its proper divisors (2102785106).

1989120910 is a wasteful number, since it uses less digits than its factorization.

1989120910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28416027.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 1989120910 is about 44599.5617691475. The cubic root of 1989120910 is about 1257.6324294313.

The spelling of 1989120910 in words is "one billion, nine hundred eighty-nine million, one hundred twenty thousand, nine hundred ten".