1345723820 has 48 divisors (see below), whose sum is σ = 3268677888. Its totient is φ = 455828160.

The previous prime is 1345723817. The next prime is 1345723823. The reversal of 1345723820 is 283275431.

It is an interprime number because it is at equal distance from previous prime (1345723817) and next prime (1345723823).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (1345723823) 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, 46286 + ... + 69525.

It is an arithmetic number, because the mean of its divisors is an integer number (68097456).

Almost surely, 2^1345723820 is an apocalyptic number.

1345723820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345723820 is an abundant number, since it is smaller than the sum of its proper divisors (1922954068).

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

1345723820 is a wasteful number, since it uses less digits than its factorization.

1345723820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115910 (or 115908 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1345723820 is about 36684.1085485255. The cubic root of 1345723820 is about 1104.0412833316.

The spelling of 1345723820 in words is "one billion, three hundred forty-five million, seven hundred twenty-three thousand, eight hundred twenty".