1451440540 has 48 divisors (see below), whose sum is σ = 3327708384. Its totient is φ = 527385600.

The previous prime is 1451440537. The next prime is 1451440561. The reversal of 1451440540 is 450441541.

It is a junction number, because it is equal to n+sod(n) for n = 1451440499 and 1451440508.

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, 553312 + ... + 555928.

It is an arithmetic number, because the mean of its divisors is an integer number (69327258).

Almost surely, 2^1451440540 is an apocalyptic number.

1451440540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1451440540 is an abundant number, since it is smaller than the sum of its proper divisors (1876267844).

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

1451440540 is a wasteful number, since it uses less digits than its factorization.

1451440540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158 (or 5156 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1451440540 is about 38097.7760505781. The cubic root of 1451440540 is about 1132.2258941867.

The spelling of 1451440540 in words is "one billion, four hundred fifty-one million, four hundred forty thousand, five hundred forty".