1949863240 has 64 divisors (see below), whose sum is σ = 4839957360. Its totient is φ = 702382080.

The previous prime is 1949863219. The next prime is 1949863243. The reversal of 1949863240 is 423689491.

It can be written as a sum of positive squares in 8 ways, for example, as 9108324 + 1940754916 = 3018^2 + 44054^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1949863243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24409 + ... + 67048.

Almost surely, 2^1949863240 is an apocalyptic number.

1949863240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1949863240 is an abundant number, since it is smaller than the sum of its proper divisors (2890094120).

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

1949863240 is a wasteful number, since it uses less digits than its factorization.

1949863240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91522 (or 91518 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 1949863240 is about 44157.2558024160. The cubic root of 1949863240 is about 1249.3037701499.

The spelling of 1949863240 in words is "one billion, nine hundred forty-nine million, eight hundred sixty-three thousand, two hundred forty".