1045299920 has 160 divisors (see below), whose sum is σ = 2902314240. Its totient is φ = 342650880.

The previous prime is 1045299919. The next prime is 1045299947. The reversal of 1045299920 is 299925401.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1216451 + ... + 1217309.

It is an arithmetic number, because the mean of its divisors is an integer number (18139464).

Almost surely, 2^1045299920 is an apocalyptic number.

1045299920 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 1045299920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451157120).

1045299920 is an abundant number, since it is smaller than the sum of its proper divisors (1857014320).

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

1045299920 is a wasteful number, since it uses less digits than its factorization.

1045299920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1045299920 is about 32331.0983419988. The cubic root of 1045299920 is about 1014.8775346271.

The spelling of 1045299920 in words is "one billion, forty-five million, two hundred ninety-nine thousand, nine hundred twenty".