1906857164 has 6 divisors (see below), whose sum is σ = 3337000044. Its totient is φ = 953428580.

The previous prime is 1906857149. The next prime is 1906857179. The reversal of 1906857164 is 4617586091.

It is an interprime number because it is at equal distance from previous prime (1906857149) and next prime (1906857179).

It is a super-2 number, since 2×1906857164² = 7272208487796245792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238357142 + ... + 238357149.

It is an arithmetic number, because the mean of its divisors is an integer number (556166674).

Almost surely, 2^1906857164 is an apocalyptic number.

It is an amenable number.

1906857164 is a deficient number, since it is larger than the sum of its proper divisors (1430142880).

1906857164 is a wasteful number, since it uses less digits than its factorization.

1906857164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476714295 (or 476714293 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1906857164 is about 43667.5756597501. The cubic root of 1906857164 is about 1240.0505451127.

The spelling of 1906857164 in words is "one billion, nine hundred six million, eight hundred fifty-seven thousand, one hundred sixty-four".