1945745290 has 16 divisors (see below), whose sum is σ = 3507903360. Its totient is φ = 777062160.

The previous prime is 1945745281. The next prime is 1945745297. The reversal of 1945745290 is 925475491.

It is a self number, because there is not a number n which added to its sum of digits gives 1945745290.

It is not an unprimeable number, because it can be changed into a prime (1945745297) 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, 147870 + ... + 160489.

It is an arithmetic number, because the mean of its divisors is an integer number (219243960).

Almost surely, 2^1945745290 is an apocalyptic number.

1945745290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1945745290 is a deficient number, since it is larger than the sum of its proper divisors (1562158070).

1945745290 is a wasteful number, since it uses less digits than its factorization.

1945745290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308997.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 1945745290 is about 44110.6029203864. The cubic root of 1945745290 is about 1248.4236748615.

The spelling of 1945745290 in words is "one billion, nine hundred forty-five million, seven hundred forty-five thousand, two hundred ninety".