1309640190 has 32 divisors (see below), whose sum is σ = 3155677056. Its totient is φ = 347844000.

The previous prime is 1309640183. The next prime is 1309640201. The reversal of 1309640190 is 910469031.

It is a super-2 number, since 2×1309640190² = 3430314854526472200, which contains 22 as substring.

It is a Curzon 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, 79432 + ... + 94491.

It is an arithmetic number, because the mean of its divisors is an integer number (98614908).

Almost surely, 2^1309640190 is an apocalyptic number.

1309640190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309640190 is an abundant number, since it is smaller than the sum of its proper divisors (1846036866).

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

1309640190 is a wasteful number, since it uses less digits than its factorization.

1309640190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174184.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1309640190 is about 36188.9512144245. The cubic root of 1309640190 is about 1094.0839944778.

The spelling of 1309640190 in words is "one billion, three hundred nine million, six hundred forty thousand, one hundred ninety".