290384638 has 16 divisors (see below), whose sum is σ = 460483920. Its totient is φ = 136956096.

The previous prime is 290384623. The next prime is 290384641. The reversal of 290384638 is 836483092.

290384638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 290384594 and 290384603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7545 + ... + 25252.

It is an arithmetic number, because the mean of its divisors is an integer number (28780245).

Almost surely, 2^290384638 is an apocalyptic number.

290384638 is a deficient number, since it is larger than the sum of its proper divisors (170099282).

290384638 is a wasteful number, since it uses less digits than its factorization.

290384638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33051.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 290384638 is about 17040.6759842443. The cubic root of 290384638 is about 662.2031045614.

The spelling of 290384638 in words is "two hundred ninety million, three hundred eighty-four thousand, six hundred thirty-eight".