1040451440 has 40 divisors (see below), whose sum is σ = 2764629600. Its totient is φ = 356726016.

The previous prime is 1040451439. The next prime is 1040451463. The reversal of 1040451440 is 441540401.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 928415 + ... + 929534.

It is an arithmetic number, because the mean of its divisors is an integer number (69115740).

Almost surely, 2^1040451440 is an apocalyptic number.

1040451440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040451440 is an abundant number, since it is smaller than the sum of its proper divisors (1724178160).

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

1040451440 is a wasteful number, since it uses less digits than its factorization.

1040451440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857969 (or 1857963 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1040451440 is about 32256.0295138754. The cubic root of 1040451440 is about 1013.3059789861.

Adding to 1040451440 its reverse (441540401), we get a palindrome (1481991841).

The spelling of 1040451440 in words is "one billion, forty million, four hundred fifty-one thousand, four hundred forty".