1457157823 has 16 divisors (see below), whose sum is σ = 1677686400. Its totient is φ = 1251672480.

The previous prime is 1457157817. The next prime is 1457157827. The reversal of 1457157823 is 3287517541.

It is a cyclic number.

It is not a de Polignac number, because 1457157823 - 2⁹ = 1457157311 is a prime.

It is a super-2 number, since 2×1457157823² = 4246617842260198658, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1457157823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1457157827) 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, 72340 + ... + 90262.

It is an arithmetic number, because the mean of its divisors is an integer number (104855400).

Almost surely, 2^1457157823 is an apocalyptic number.

1457157823 is a deficient number, since it is larger than the sum of its proper divisors (220528577).

1457157823 is a wasteful number, since it uses less digits than its factorization.

1457157823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18342.

The product of its digits is 235200, while the sum is 43.

The square root of 1457157823 is about 38172.7366454123. The cubic root of 1457157823 is about 1133.7105743504.

The spelling of 1457157823 in words is "one billion, four hundred fifty-seven million, one hundred fifty-seven thousand, eight hundred twenty-three".