1491191950 has 24 divisors (see below), whose sum is σ = 2775773232. Its totient is φ = 596013120.

The previous prime is 1491191927. The next prime is 1491191987. The reversal of 1491191950 is 591911941.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57442 + ... + 79258.

It is an arithmetic number, because the mean of its divisors is an integer number (115657218).

Almost surely, 2^1491191950 is an apocalyptic number.

1491191950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1491191950 is a deficient number, since it is larger than the sum of its proper divisors (1284581282).

1491191950 is a wasteful number, since it uses less digits than its factorization.

1491191950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23196 (or 23191 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 40.

The square root of 1491191950 is about 38615.9546042824. The cubic root of 1491191950 is about 1142.4692425009.

The spelling of 1491191950 in words is "one billion, four hundred ninety-one million, one hundred ninety-one thousand, nine hundred fifty".