1951005490 has 32 divisors (see below), whose sum is σ = 4058605440. Its totient is φ = 661398144.

The previous prime is 1951005487. The next prime is 1951005547. The reversal of 1951005490 is 945001591.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150352 + ... + 162811.

It is an arithmetic number, because the mean of its divisors is an integer number (126831420).

Almost surely, 2^1951005490 is an apocalyptic number.

1951005490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1951005490 is an abundant number, since it is smaller than the sum of its proper divisors (2107599950).

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

1951005490 is a wasteful number, since it uses less digits than its factorization.

1951005490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313266.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 1951005490 is about 44170.1877967482. The cubic root of 1951005490 is about 1249.5476742075.

The spelling of 1951005490 in words is "one billion, nine hundred fifty-one million, five thousand, four hundred ninety".