745784442 has 64 divisors (see below), whose sum is σ = 1789200000. Its totient is φ = 228904704.

The previous prime is 745784401. The next prime is 745784461. The reversal of 745784442 is 244487547.

745784442 is a `hidden beast` number, since 74 + 578 + 4 + 4 + 4 + 2 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349234 + ... + 351362.

It is an arithmetic number, because the mean of its divisors is an integer number (27956250).

Almost surely, 2^745784442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745784442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894600000).

745784442 is an abundant number, since it is smaller than the sum of its proper divisors (1043415558).

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

745784442 is a wasteful number, since it uses less digits than its factorization.

745784442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652 (or 2646 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 45.

The square root of 745784442 is about 27309.0542128430. The cubic root of 745784442 is about 906.8548354823.

The spelling of 745784442 in words is "seven hundred forty-five million, seven hundred eighty-four thousand, four hundred forty-two".