1345772638 has 8 divisors (see below), whose sum is σ = 2307038832. Its totient is φ = 576759696.

The previous prime is 1345772629. The next prime is 1345772639. The reversal of 1345772638 is 8362775431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1345772638² = 3622207986378958088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345772639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48063295 + ... + 48063322.

It is an arithmetic number, because the mean of its divisors is an integer number (288379854).

Almost surely, 2^1345772638 is an apocalyptic number.

1345772638 is a deficient number, since it is larger than the sum of its proper divisors (961266194).

1345772638 is an equidigital number, since it uses as much as digits as its factorization.

1345772638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96126626.

The product of its digits is 846720, while the sum is 46.

The square root of 1345772638 is about 36684.7739259764. The cubic root of 1345772638 is about 1104.0546333803.

The spelling of 1345772638 in words is "one billion, three hundred forty-five million, seven hundred seventy-two thousand, six hundred thirty-eight".