1457236440 has 128 divisors (see below), whose sum is σ = 5299084800. Its totient is φ = 353266560.

The previous prime is 1457236423. The next prime is 1457236493. The reversal of 1457236440 is 446327541.

1457236440 is a `hidden beast` number, since 1 + 4 + 5 + 7 + 2 + 3 + 644 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1457236395 and 1457236404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49452 + ... + 73211.

It is an arithmetic number, because the mean of its divisors is an integer number (41399100).

Almost surely, 2^1457236440 is an apocalyptic number.

1457236440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1457236440 is an abundant number, since it is smaller than the sum of its proper divisors (3841848360).

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

1457236440 is a wasteful number, since it uses less digits than its factorization.

1457236440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122694 (or 122684 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 1457236440 is about 38173.7663847831. The cubic root of 1457236440 is about 1133.7309627440.

The spelling of 1457236440 in words is "one billion, four hundred fifty-seven million, two hundred thirty-six thousand, four hundred forty".