7770042 has 24 divisors (see below), whose sum is σ = 19240416. Its totient is φ = 2219976.

The previous prime is 7770041. The next prime is 7770053. The reversal of 7770042 is 2400777.

It is a happy number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7769988 and 7770015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7770041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30708 + ... + 30959.

It is an arithmetic number, because the mean of its divisors is an integer number (801684).

Almost surely, 2^7770042 is an apocalyptic number.

7770042 is an abundant number, since it is smaller than the sum of its proper divisors (11470374).

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

7770042 is a wasteful number, since it uses less digits than its factorization.

7770042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61682 (or 61679 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 7770042 is about 2787.4795066511. The cubic root of 7770042 is about 198.0650230274.

The spelling of 7770042 in words is "seven million, seven hundred seventy thousand, forty-two".