7744442 has 4 divisors (see below), whose sum is σ = 11616666. Its totient is φ = 3872220.

The previous prime is 7744441. The next prime is 7744453. The reversal of 7744442 is 2444477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2444477 = 7 ⋅349211.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 231361 = 2741^2 + 481^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7744399 and 7744408.

It is not an unprimeable number, because it can be changed into a prime (7744441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1936109 + ... + 1936112.

Almost surely, 2^7744442 is an apocalyptic number.

7744442 is a deficient number, since it is larger than the sum of its proper divisors (3872224).

7744442 is a wasteful number, since it uses less digits than its factorization.

7744442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872223.

The product of its digits is 25088, while the sum is 32.

The square root of 7744442 is about 2782.8837561062. The cubic root of 7744442 is about 197.8472617263.

The spelling of 7744442 in words is "seven million, seven hundred forty-four thousand, four hundred forty-two".