2878406 has 8 divisors (see below), whose sum is σ = 4571640. Its totient is φ = 1354528.

The previous prime is 2878397. The next prime is 2878409. The reversal of 2878406 is 6048782.

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

It is a super-2 number, since 2×2878406² = 16570442201672, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878409) 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, 42296 + ... + 42363.

It is an arithmetic number, because the mean of its divisors is an integer number (571455).

2^2878406 is an apocalyptic number.

2878406 is a deficient number, since it is larger than the sum of its proper divisors (1693234).

2878406 is a wasteful number, since it uses less digits than its factorization.

2878406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84678.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 2878406 is about 1696.5865730932. The cubic root of 2878406 is about 142.2494787803.

The spelling of 2878406 in words is "two million, eight hundred seventy-eight thousand, four hundred six".