457021540 has 24 divisors (see below), whose sum is σ = 1016201592. Its totient is φ = 172055040.

The previous prime is 457021531. The next prime is 457021549. The reversal of 457021540 is 45120754.

It is an interprime number because it is at equal distance from previous prime (457021531) and next prime (457021549).

It can be written as a sum of positive squares in 4 ways, for example, as 251729956 + 205291584 = 15866^2 + 14328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 457021499 and 457021508.

It is not an unprimeable number, because it can be changed into a prime (457021549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671751 + ... + 672430.

It is an arithmetic number, because the mean of its divisors is an integer number (42341733).

Almost surely, 2^457021540 is an apocalyptic number.

It is an amenable number.

457021540 is an abundant number, since it is smaller than the sum of its proper divisors (559180052).

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

457021540 is a wasteful number, since it uses less digits than its factorization.

457021540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344207 (or 1344205 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 457021540 is about 21378.0621198461. The cubic root of 457021540 is about 770.2745633552.

The spelling of 457021540 in words is "four hundred fifty-seven million, twenty-one thousand, five hundred forty".