1890386734 has 16 divisors (see below), whose sum is σ = 2878948800. Its totient is φ = 930799584.

The previous prime is 1890386711. The next prime is 1890386737. The reversal of 1890386734 is 4376830981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890386737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46084 + ... + 76840.

It is an arithmetic number, because the mean of its divisors is an integer number (179934300).

Almost surely, 2^1890386734 is an apocalyptic number.

1890386734 is a deficient number, since it is larger than the sum of its proper divisors (988562066).

1890386734 is a wasteful number, since it uses less digits than its factorization.

1890386734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31227.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 1890386734 is about 43478.5778746269. The cubic root of 1890386734 is about 1236.4699144108.

The spelling of 1890386734 in words is "one billion, eight hundred ninety million, three hundred eighty-six thousand, seven hundred thirty-four".