1906077644 has 48 divisors (see below), whose sum is σ = 3657265920. Its totient is φ = 866013120.

The previous prime is 1906077631. The next prime is 1906077647. The reversal of 1906077644 is 4467706091.

It is a junction number, because it is equal to n+sod(n) for n = 1906077595 and 1906077604.

It is not an unprimeable number, because it can be changed into a prime (1906077647) 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, 194879 + ... + 204425.

It is an arithmetic number, because the mean of its divisors is an integer number (76193040).

Almost surely, 2^1906077644 is an apocalyptic number.

It is an amenable number.

1906077644 is a deficient number, since it is larger than the sum of its proper divisors (1751188276).

1906077644 is a wasteful number, since it uses less digits than its factorization.

1906077644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9678 (or 9676 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 1906077644 is about 43658.6491316440. The cubic root of 1906077644 is about 1239.8815452229.

The spelling of 1906077644 in words is "one billion, nine hundred six million, seventy-seven thousand, six hundred forty-four".