1345557790 has 32 divisors (see below), whose sum is σ = 2507157504. Its totient is φ = 519397920.

The previous prime is 1345557781. The next prime is 1345557791. The reversal of 1345557790 is 977555431.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1345557790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345557791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107857 + ... + 119683.

It is an arithmetic number, because the mean of its divisors is an integer number (78348672).

Almost surely, 2^1345557790 is an apocalyptic number.

1345557790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1345557790 is a deficient number, since it is larger than the sum of its proper divisors (1161599714).

1345557790 is a wasteful number, since it uses less digits than its factorization.

1345557790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12232.

The product of its (nonzero) digits is 661500, while the sum is 46.

The square root of 1345557790 is about 36681.8455097341. The cubic root of 1345557790 is about 1103.9958774044.

The spelling of 1345557790 in words is "one billion, three hundred forty-five million, five hundred fifty-seven thousand, seven hundred ninety".