1914139690 has 16 divisors (see below), whose sum is σ = 3456535680. Its totient is φ = 763192720.

The previous prime is 1914139687. The next prime is 1914139697. The reversal of 1914139690 is 969314191.

It is a super-2 number, since 2×1914139690² = 7327861505666592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1914139697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304630 + ... + 310849.

It is an arithmetic number, because the mean of its divisors is an integer number (216033480).

Almost surely, 2^1914139690 is an apocalyptic number.

1914139690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1914139690 is a deficient number, since it is larger than the sum of its proper divisors (1542395990).

1914139690 is a wasteful number, since it uses less digits than its factorization.

1914139690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615797.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 1914139690 is about 43750.8821625347. The cubic root of 1914139690 is about 1241.6271757380.

The spelling of 1914139690 in words is "one billion, nine hundred fourteen million, one hundred thirty-nine thousand, six hundred ninety".