1452731840 has 112 divisors (see below), whose sum is σ = 3974592000. Its totient is φ = 495424512.

The previous prime is 1452731779. The next prime is 1452731843. The reversal of 1452731840 is 481372541.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×1452731840² = 4220859597899571200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1452731840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1452731843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444131 + ... + 447389.

Almost surely, 2^1452731840 is an apocalyptic number.

1452731840 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 1452731840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987296000).

1452731840 is an abundant number, since it is smaller than the sum of its proper divisors (2521860160).

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

1452731840 is a wasteful number, since it uses less digits than its factorization.

1452731840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482 (or 3472 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1452731840 is about 38114.7194663689. The cubic root of 1452731840 is about 1132.5615629914.

The spelling of 1452731840 in words is "one billion, four hundred fifty-two million, seven hundred thirty-one thousand, eight hundred forty".