290445399 has 8 divisors (see below), whose sum is σ = 430289520. Its totient is φ = 193630248.

The previous prime is 290445373. The next prime is 290445409. The reversal of 290445399 is 993544092.

It is a happy number.

It is not a de Polignac number, because 290445399 - 2⁵ = 290445367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290445499) 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, 5378592 + ... + 5378645.

It is an arithmetic number, because the mean of its divisors is an integer number (53786190).

Almost surely, 2^290445399 is an apocalyptic number.

290445399 is a deficient number, since it is larger than the sum of its proper divisors (139844121).

290445399 is a wasteful number, since it uses less digits than its factorization.

290445399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10757246 (or 10757240 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 290445399 is about 17042.4587134603. The cubic root of 290445399 is about 662.2492884976.

It can be divided in two parts, 29044 and 5399, that added together give a palindrome (34443).

The spelling of 290445399 in words is "two hundred ninety million, four hundred forty-five thousand, three hundred ninety-nine".