1400453240 has 64 divisors (see below), whose sum is σ = 3234924000. Its totient is φ = 545352192.

The previous prime is 1400453227. The next prime is 1400453261. The reversal of 1400453240 is 423540041.

It is a super-2 number, since 2×1400453240² = 3922538554852995200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599114 + ... + 601446.

Almost surely, 2^1400453240 is an apocalyptic number.

1400453240 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 1400453240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617462000).

1400453240 is an abundant number, since it is smaller than the sum of its proper divisors (1834470760).

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

1400453240 is a wasteful number, since it uses less digits than its factorization.

1400453240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736 (or 2732 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1400453240 is about 37422.6300518817. The cubic root of 1400453240 is about 1118.8096515742.

Adding to 1400453240 its reverse (423540041), we get a palindrome (1823993281).

The spelling of 1400453240 in words is "one billion, four hundred million, four hundred fifty-three thousand, two hundred forty".