290607638 has 4 divisors (see below), whose sum is σ = 435911460. Its totient is φ = 145303818.

The previous prime is 290607607. The next prime is 290607643. The reversal of 290607638 is 836706092.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 290607595 and 290607604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72651908 + ... + 72651911.

It is an arithmetic number, because the mean of its divisors is an integer number (108977865).

Almost surely, 2^290607638 is an apocalyptic number.

290607638 is a deficient number, since it is larger than the sum of its proper divisors (145303822).

290607638 is a wasteful number, since it uses less digits than its factorization.

290607638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145303821.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 290607638 is about 17047.2178961847. The cubic root of 290607638 is about 662.3725734748.

The spelling of 290607638 in words is "two hundred ninety million, six hundred seven thousand, six hundred thirty-eight".