7449781044 has 12 divisors (see below), whose sum is σ = 17382822464. Its totient is φ = 2483260344.

The previous prime is 7449781043. The next prime is 7449781051. The reversal of 7449781044 is 4401879447.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 7449780984 and 7449781002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7449781043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310407532 + ... + 310407555.

Almost surely, 2^7449781044 is an apocalyptic number.

It is an amenable number.

7449781044 is an abundant number, since it is smaller than the sum of its proper divisors (9933041420).

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

7449781044 is a wasteful number, since it uses less digits than its factorization.

7449781044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620815094 (or 620815092 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 7449781044 is about 86312.1141207884. The cubic root of 7449781044 is about 1953.0551315001.

The spelling of 7449781044 in words is "seven billion, four hundred forty-nine million, seven hundred eighty-one thousand, forty-four".