1453321440 has 120 divisors (see below), whose sum is σ = 5129059320. Its totient is φ = 387548928.

The previous prime is 1453321433. The next prime is 1453321469. The reversal of 1453321440 is 441233541.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×1453321440² = 4224286415927347200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43110 + ... + 69029.

It is an arithmetic number, because the mean of its divisors is an integer number (42742161).

Almost surely, 2^1453321440 is an apocalyptic number.

1453321440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1453321440 is an abundant number, since it is smaller than the sum of its proper divisors (3675737880).

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

1453321440 is a wasteful number, since it uses less digits than its factorization.

1453321440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112166 (or 112149 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1453321440 is about 38122.4532264124. The cubic root of 1453321440 is about 1132.7147612536.

Adding to 1453321440 its reverse (441233541), we get a palindrome (1894554981).

The spelling of 1453321440 in words is "one billion, four hundred fifty-three million, three hundred twenty-one thousand, four hundred forty".