145739394 has 12 divisors (see below), whose sum is σ = 315768726. Its totient is φ = 48579792.

The previous prime is 145739393. The next prime is 145739459. The reversal of 145739394 is 493937541.

145739394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 138368169 + 7371225 = 11763^2 + 2715^2 .

It is not an unprimeable number, because it can be changed into a prime (145739393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4048299 + ... + 4048334.

Almost surely, 2^145739394 is an apocalyptic number.

145739394 is an abundant number, since it is smaller than the sum of its proper divisors (170029332).

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

145739394 is a wasteful number, since it uses less digits than its factorization.

145739394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096641 (or 8096638 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 145739394 is about 12072.2572040195. The cubic root of 145739394 is about 526.2502556029.

The spelling of 145739394 in words is "one hundred forty-five million, seven hundred thirty-nine thousand, three hundred ninety-four".