745001890 has 16 divisors (see below), whose sum is σ = 1350794232. Its totient is φ = 295825024.

The previous prime is 745001879. The next prime is 745001893. The reversal of 745001890 is 98100547.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 733705569 + 11296321 = 27087^2 + 3361^2 .

It is a super-2 number, since 2×745001890² = 1110055632207144200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (745001893) 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, 270529 + ... + 273268.

Almost surely, 2^745001890 is an apocalyptic number.

745001890 is a deficient number, since it is larger than the sum of its proper divisors (605792342).

745001890 is a wasteful number, since it uses less digits than its factorization.

745001890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543941.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 745001890 is about 27294.7227500116. The cubic root of 745001890 is about 906.5375367269.

The spelling of 745001890 in words is "seven hundred forty-five million, one thousand, eight hundred ninety".