1045626820 has 48 divisors (see below), whose sum is σ = 2657128320. Its totient is φ = 337411584.

The previous prime is 1045626817. The next prime is 1045626821. The reversal of 1045626820 is 286265401.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (1045626821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217290 + ... + 222049.

It is an arithmetic number, because the mean of its divisors is an integer number (55356840).

Almost surely, 2^1045626820 is an apocalyptic number.

1045626820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045626820 is an abundant number, since it is smaller than the sum of its proper divisors (1611501500).

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

1045626820 is a wasteful number, since it uses less digits than its factorization.

1045626820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439372 (or 439370 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1045626820 is about 32336.1534508977. The cubic root of 1045626820 is about 1014.9833189037.

The spelling of 1045626820 in words is "one billion, forty-five million, six hundred twenty-six thousand, eight hundred twenty".