1870420690 has 16 divisors (see below), whose sum is σ = 3367665792. Its totient is φ = 747966384.

The previous prime is 1870420679. The next prime is 1870420757. The reversal of 1870420690 is 960240781.

It is a super-2 number, since 2×1870420690² = 6996947115160152200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17047 + ... + 63493.

It is an arithmetic number, because the mean of its divisors is an integer number (210479112).

Almost surely, 2^1870420690 is an apocalyptic number.

1870420690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1870420690 is a deficient number, since it is larger than the sum of its proper divisors (1497245102).

1870420690 is a wasteful number, since it uses less digits than its factorization.

1870420690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50481.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1870420690 is about 43248.3605469618. The cubic root of 1870420690 is about 1232.1013477267.

The spelling of 1870420690 in words is "one billion, eight hundred seventy million, four hundred twenty thousand, six hundred ninety".