2623378 has 4 divisors (see below), whose sum is σ = 3935070. Its totient is φ = 1311688.

The previous prime is 2623373. The next prime is 2623391. The reversal of 2623378 is 8733262.

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

It can be written as a sum of positive squares in only one way, i.e., 2601769 + 21609 = 1613^2 + 147^2 .

It is a super-2 number, since 2×2623378² = 13764224261768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2623373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655843 + ... + 655846.

2^2623378 is an apocalyptic number.

2623378 is a deficient number, since it is larger than the sum of its proper divisors (1311692).

2623378 is a wasteful number, since it uses less digits than its factorization.

2623378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311691.

The product of its digits is 12096, while the sum is 31.

The square root of 2623378 is about 1619.6845371862. The cubic root of 2623378 is about 137.9177904252.

The spelling of 2623378 in words is "two million, six hundred twenty-three thousand, three hundred seventy-eight".