290423870 has 16 divisors (see below), whose sum is σ = 570287088. Its totient is φ = 105608640.

The previous prime is 290423863. The next prime is 290423933. The reversal of 290423870 is 78324092.

It is a self number, because there is not a number n which added to its sum of digits gives 290423870.

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, 1319999 + ... + 1320218.

It is an arithmetic number, because the mean of its divisors is an integer number (35642943).

Almost surely, 2^290423870 is an apocalyptic number.

290423870 is a deficient number, since it is larger than the sum of its proper divisors (279863218).

290423870 is a wasteful number, since it uses less digits than its factorization.

290423870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640235.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 290423870 is about 17041.8270734097. The cubic root of 290423870 is about 662.2329252187.

The spelling of 290423870 in words is "two hundred ninety million, four hundred twenty-three thousand, eight hundred seventy".