7402891481 has 24 divisors (see below), whose sum is σ = 8168656320. Its totient is φ = 6692384160.

The previous prime is 7402891459. The next prime is 7402891487. The reversal of 7402891481 is 1841982047.

It is not a de Polignac number, because 7402891481 - 2¹⁸ = 7402629337 is a prime.

It is a super-2 number, since 2×7402891481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7402891487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 946535 + ... + 954323.

It is an arithmetic number, because the mean of its divisors is an integer number (340360680).

Almost surely, 2^7402891481 is an apocalyptic number.

It is an amenable number.

7402891481 is a deficient number, since it is larger than the sum of its proper divisors (765764839).

7402891481 is a wasteful number, since it uses less digits than its factorization.

7402891481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7917 (or 7886 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 7402891481 is about 86040.0574209478. The cubic root of 7402891481 is about 1948.9489388116.

The spelling of 7402891481 in words is "seven billion, four hundred two million, eight hundred ninety-one thousand, four hundred eighty-one".