7290655138 has 32 divisors (see below), whose sum is σ = 12343161600. Its totient is φ = 3204501696.

The previous prime is 7290655133. The next prime is 7290655147. The reversal of 7290655138 is 8315560927.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (7290655133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110323 + ... + 163561.

It is an arithmetic number, because the mean of its divisors is an integer number (385723800).

Almost surely, 2^7290655138 is an apocalyptic number.

7290655138 is a deficient number, since it is larger than the sum of its proper divisors (5052506462).

7290655138 is a wasteful number, since it uses less digits than its factorization.

7290655138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53506.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 7290655138 is about 85385.3332721727. Note that the first 3 decimals coincide. The cubic root of 7290655138 is about 1939.0493037346.

The spelling of 7290655138 in words is "seven billion, two hundred ninety million, six hundred fifty-five thousand, one hundred thirty-eight".