1678407644 has 6 divisors (see below), whose sum is σ = 2937213384. Its totient is φ = 839203820.

The previous prime is 1678407629. The next prime is 1678407677. The reversal of 1678407644 is 4467048761.

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, 209800952 + ... + 209800959.

It is an arithmetic number, because the mean of its divisors is an integer number (489535564).

Almost surely, 2^1678407644 is an apocalyptic number.

It is an amenable number.

1678407644 is a deficient number, since it is larger than the sum of its proper divisors (1258805740).

1678407644 is a wasteful number, since it uses less digits than its factorization.

1678407644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419601915 (or 419601913 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 47.

The square root of 1678407644 is about 40968.3737046029. The cubic root of 1678407644 is about 1188.4086829448.

The spelling of 1678407644 in words is "one billion, six hundred seventy-eight million, four hundred seven thousand, six hundred forty-four".