1678402 has 32 divisors (see below), whose sum is σ = 2985984. Its totient is φ = 699600.

The previous prime is 1678399. The next prime is 1678409. The reversal of 1678402 is 2048761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15633 + ... + 15739.

It is an arithmetic number, because the mean of its divisors is an integer number (93312).

2^1678402 is an apocalyptic number.

1678402 is a deficient number, since it is larger than the sum of its proper divisors (1307582).

1678402 is a wasteful number, since it uses less digits than its factorization.

1678402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1678402 is about 1295.5315511403. The cubic root of 1678402 is about 118.8407350852.

It can be divided in two parts, 1678 and 402, that added together give a triangular number (2080 = T₆₄).

The spelling of 1678402 in words is "one million, six hundred seventy-eight thousand, four hundred two".