1913340690 has 128 divisors (see below), whose sum is σ = 5228582400. Its totient is φ = 503978112.

The previous prime is 1913340613. The next prime is 1913340749. The reversal of 1913340690 is 960433191.

It is a super-2 number, since 2×1913340690² = 7321745192019352200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1945939 + ... + 1946921.

It is an arithmetic number, because the mean of its divisors is an integer number (40848300).

Almost surely, 2^1913340690 is an apocalyptic number.

1913340690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1913340690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2614291200).

1913340690 is an abundant number, since it is smaller than the sum of its proper divisors (3315241710).

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

1913340690 is an frugal number, since it uses more digits than its factorization.

1913340690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 1913340690 is about 43741.7499649934. The cubic root of 1913340690 is about 1241.4543917304.

The spelling of 1913340690 in words is "one billion, nine hundred thirteen million, three hundred forty thousand, six hundred ninety".