1344445690 has 32 divisors (see below), whose sum is σ = 2840471424. Its totient is φ = 448493760.

The previous prime is 1344445667. The next prime is 1344445709. The reversal of 1344445690 is 965444431.

It is a super-2 number, since 2×1344445690² = 3615068426719152200, which contains 22 as substring.

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, 256956 + ... + 262135.

It is an arithmetic number, because the mean of its divisors is an integer number (88764732).

Almost surely, 2^1344445690 is an apocalyptic number.

1344445690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1344445690 is an abundant number, since it is smaller than the sum of its proper divisors (1496025734).

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

1344445690 is a wasteful number, since it uses less digits than its factorization.

1344445690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519142.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 1344445690 is about 36666.6836515112. The cubic root of 1344445690 is about 1103.6916436696.

The spelling of 1344445690 in words is "one billion, three hundred forty-four million, four hundred forty-five thousand, six hundred ninety".