1453043440 has 40 divisors (see below), whose sum is σ = 3391220448. Its totient is φ = 578999040.

The previous prime is 1453043437. The next prime is 1453043467. The reversal of 1453043440 is 443403541.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1453043440² = 4222670477054067200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1453043399 and 1453043408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13491 + ... + 55570.

Almost surely, 2^1453043440 is an apocalyptic number.

1453043440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1453043440 is an abundant number, since it is smaller than the sum of its proper divisors (1938177008).

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

1453043440 is a wasteful number, since it uses less digits than its factorization.

1453043440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69337 (or 69331 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1453043440 is about 38118.8069068275. The cubic root of 1453043440 is about 1132.6425325010.

Adding to 1453043440 its reverse (443403541), we get a palindrome (1896446981).

It can be divided in two parts, 14530 and 43440, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 1453043440 in words is "one billion, four hundred fifty-three million, forty-three thousand, four hundred forty".