1210371990 has 16 divisors (see below), whose sum is σ = 2904892848. Its totient is φ = 322765856.

The previous prime is 1210371989. The next prime is 1210372013. The reversal of 1210371990 is 991730121.

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, 20172837 + ... + 20172896.

It is an arithmetic number, because the mean of its divisors is an integer number (181555803).

Almost surely, 2^1210371990 is an apocalyptic number.

1210371990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1210371990 is an abundant number, since it is smaller than the sum of its proper divisors (1694520858).

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

1210371990 is a wasteful number, since it uses less digits than its factorization.

1210371990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40345743.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 1210371990 is about 34790.4008312638. The cubic root of 1210371990 is about 1065.7114248553.

The spelling of 1210371990 in words is "one billion, two hundred ten million, three hundred seventy-one thousand, nine hundred ninety".