2688451406 has 4 divisors (see below), whose sum is σ = 4032677112. Its totient is φ = 1344225702.

The previous prime is 2688451399. The next prime is 2688451411. The reversal of 2688451406 is 6041548862.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672112850 + ... + 672112853.

It is an arithmetic number, because the mean of its divisors is an integer number (1008169278).

Almost surely, 2^2688451406 is an apocalyptic number.

2688451406 is a deficient number, since it is larger than the sum of its proper divisors (1344225706).

2688451406 is a wasteful number, since it uses less digits than its factorization.

2688451406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344225705.

The product of its (nonzero) digits is 368640, while the sum is 44.

The square root of 2688451406 is about 51850.2787456345. The cubic root of 2688451406 is about 1390.4884859038.

The spelling of 2688451406 in words is "two billion, six hundred eighty-eight million, four hundred fifty-one thousand, four hundred six".