7243493940 has 36 divisors (see below), whose sum is σ = 21971932164. Its totient is φ = 1931598336.

The previous prime is 7243493893. The next prime is 7243493969. The reversal of 7243493940 is 493943427.

7243493940 is a `hidden beast` number, since 72 + 4 + 3 + 493 + 94 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1695627684 + 5547866256 = 41178^2 + 74484^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 20120637 + ... + 20120996.

It is an arithmetic number, because the mean of its divisors is an integer number (610331449).

Almost surely, 2^7243493940 is an apocalyptic number.

It is an amenable number.

7243493940 is an abundant number, since it is smaller than the sum of its proper divisors (14728438224).

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

7243493940 is a wasteful number, since it uses less digits than its factorization.

7243493940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40241648 (or 40241643 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The square root of 7243493940 is about 85108.7183548196. The cubic root of 7243493940 is about 1934.8592009403.

The spelling of 7243493940 in words is "seven billion, two hundred forty-three million, four hundred ninety-three thousand, nine hundred forty".