1453432440 has 128 divisors (see below), whose sum is σ = 4531982400. Its totient is φ = 372449280.

The previous prime is 1453432439. The next prime is 1453432447. The reversal of 1453432440 is 442343541.

It is a super-2 number, since 2×1453432440² = 4224931715288707200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1453432398 and 1453432407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453432447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 837814 + ... + 839546.

Almost surely, 2^1453432440 is an apocalyptic number.

1453432440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1453432440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2265991200).

1453432440 is an abundant number, since it is smaller than the sum of its proper divisors (3078549960).

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

1453432440 is a wasteful number, since it uses less digits than its factorization.

1453432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017 (or 2013 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 1453432440 is about 38123.9090335710. The cubic root of 1453432440 is about 1132.7435982184.

Adding to 1453432440 its reverse (442343541), we get a palindrome (1895775981).

The spelling of 1453432440 in words is "one billion, four hundred fifty-three million, four hundred thirty-two thousand, four hundred forty".