1809148040 has 32 divisors (see below), whose sum is σ = 4652095680. Its totient is φ = 620279232.

The previous prime is 1809148039. The next prime is 1809148049. The reversal of 1809148040 is 408419081.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (1809148049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3230342 + ... + 3230901.

It is an arithmetic number, because the mean of its divisors is an integer number (145377990).

Almost surely, 2^1809148040 is an apocalyptic number.

1809148040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1809148040 is an abundant number, since it is smaller than the sum of its proper divisors (2842947640).

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

1809148040 is a wasteful number, since it uses less digits than its factorization.

1809148040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461261 (or 6461257 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1809148040 is about 42534.0809234195. The cubic root of 1809148040 is about 1218.4976670148.

The spelling of 1809148040 in words is "one billion, eight hundred nine million, one hundred forty-eight thousand, forty".