47770778 has 16 divisors (see below), whose sum is σ = 78948000. Its totient is φ = 21498000.

The previous prime is 47770777. The next prime is 47770823. The reversal of 47770778 is 87707774.

It is not an unprimeable number, because it can be changed into a prime (47770777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8528 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (4934250).

Almost surely, 2^47770778 is an apocalyptic number.

47770778 is a deficient number, since it is larger than the sum of its proper divisors (31177222).

47770778 is a wasteful number, since it uses less digits than its factorization.

47770778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21613.

The product of its (nonzero) digits is 537824, while the sum is 47.

The square root of 47770778 is about 6911.6407603405. The cubic root of 47770778 is about 362.8446896606.

The spelling of 47770778 in words is "forty-seven million, seven hundred seventy thousand, seven hundred seventy-eight".