1042445640 has 64 divisors (see below), whose sum is σ = 3291940800. Its totient is φ = 263354112.

The previous prime is 1042445611. The next prime is 1042445641. The reversal of 1042445640 is 465442401.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1042445598 and 1042445607.

It is not an unprimeable number, because it can be changed into a prime (1042445641) 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, 226327 + ... + 230886.

It is an arithmetic number, because the mean of its divisors is an integer number (51436575).

Almost surely, 2^1042445640 is an apocalyptic number.

1042445640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1042445640 is an abundant number, since it is smaller than the sum of its proper divisors (2249495160).

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

1042445640 is a wasteful number, since it uses less digits than its factorization.

1042445640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457246 (or 457242 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 1042445640 is about 32286.9267661077. The cubic root of 1042445640 is about 1013.9529562028.

The spelling of 1042445640 in words is "one billion, forty-two million, four hundred forty-five thousand, six hundred forty".