1051443840 has 64 divisors (see below), whose sum is σ = 3351483360. Its totient is φ = 280384512.

The previous prime is 1051443823. The next prime is 1051443851. The reversal of 1051443840 is 483441501.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1051443840² = 2211068297347891200, which contains 22 as substring.

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

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1051443798 and 1051443807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271894 + ... + 275733.

Almost surely, 2^1051443840 is an apocalyptic number.

1051443840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1051443840 is an abundant number, since it is smaller than the sum of its proper divisors (2300039520).

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

1051443840 is an equidigital number, since it uses as much as digits as its factorization.

1051443840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547649 (or 547637 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1051443840 is about 32425.9747733202. The cubic root of 1051443840 is about 1016.8620208075.

The spelling of 1051443840 in words is "one billion, fifty-one million, four hundred forty-three thousand, eight hundred forty".