1906742730 has 32 divisors (see below), whose sum is σ = 4723803648. Its totient is φ = 492062400.

The previous prime is 1906742713. The next prime is 1906742731. The reversal of 1906742730 is 372476091.

It is not an unprimeable number, because it can be changed into a prime (1906742731) 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, 1024201 + ... + 1026060.

It is an arithmetic number, because the mean of its divisors is an integer number (147618864).

Almost surely, 2^1906742730 is an apocalyptic number.

1906742730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1906742730 is an abundant number, since it is smaller than the sum of its proper divisors (2817060918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1906742730 is a wasteful number, since it uses less digits than its factorization.

1906742730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050302.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 1906742730 is about 43666.2653543900. The cubic root of 1906742730 is about 1240.0257387130.

The spelling of 1906742730 in words is "one billion, nine hundred six million, seven hundred forty-two thousand, seven hundred thirty".