1949639830 has 16 divisors (see below), whose sum is σ = 3530368800. Its totient is φ = 775185472.

The previous prime is 1949639801. The next prime is 1949639833. The reversal of 1949639830 is 389369491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949639833) 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, 582055 + ... + 585394.

It is an arithmetic number, because the mean of its divisors is an integer number (220648050).

Almost surely, 2^1949639830 is an apocalyptic number.

1949639830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1949639830 is a deficient number, since it is larger than the sum of its proper divisors (1580728970).

1949639830 is a wasteful number, since it uses less digits than its factorization.

1949639830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167623.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 1949639830 is about 44154.7260211181. The cubic root of 1949639830 is about 1249.2560543904.

The spelling of 1949639830 in words is "one billion, nine hundred forty-nine million, six hundred thirty-nine thousand, eight hundred thirty".