2387890 has 8 divisors (see below), whose sum is σ = 4298220. Its totient is φ = 955152.

The previous prime is 2387873. The next prime is 2387897. The reversal of 2387890 is 987832.

It can be written as a sum of positive squares in 2 ways, for example, as 2259009 + 128881 = 1503^2 + 359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2387897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119385 + ... + 119404.

2^2387890 is an apocalyptic number.

2387890 is a deficient number, since it is larger than the sum of its proper divisors (1910330).

2387890 is a wasteful number, since it uses less digits than its factorization.

2387890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238796.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 2387890 is about 1545.2799099192. The cubic root of 2387890 is about 133.6610203881.

It can be divided in two parts, 238 and 7890, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 2387890 in words is "two million, three hundred eighty-seven thousand, eight hundred ninety".