1945450490 has 8 divisors (see below), whose sum is σ = 3501810900. Its totient is φ = 778180192.

The previous prime is 1945450487. The next prime is 1945450517. The reversal of 1945450490 is 940545491.

It can be written as a sum of positive squares in 2 ways, for example, as 1898432041 + 47018449 = 43571^2 + 6857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97272515 + ... + 97272534.

Almost surely, 2^1945450490 is an apocalyptic number.

1945450490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1945450490 is a deficient number, since it is larger than the sum of its proper divisors (1556360410).

1945450490 is a wasteful number, since it uses less digits than its factorization.

1945450490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194545056.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 1945450490 is about 44107.2611935949. The cubic root of 1945450490 is about 1248.3606220920.

The spelling of 1945450490 in words is "one billion, nine hundred forty-five million, four hundred fifty thousand, four hundred ninety".