378878477 has 8 divisors (see below), whose sum is σ = 383037336. Its totient is φ = 374742592.

The previous prime is 378878443. The next prime is 378878509. The reversal of 378878477 is 774878873.

It can be written as a sum of positive squares in 4 ways, for example, as 168454441 + 210424036 = 12979^2 + 14506^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378878477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378878777) 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, 28523 + ... + 39639.

It is an arithmetic number, because the mean of its divisors is an integer number (47879667).

Almost surely, 2^378878477 is an apocalyptic number.

It is an amenable number.

378878477 is a deficient number, since it is larger than the sum of its proper divisors (4158859).

378878477 is a wasteful number, since it uses less digits than its factorization.

378878477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487.

The product of its digits is 14751744, while the sum is 59.

The square root of 378878477 is about 19464.8009750935. The cubic root of 378878477 is about 723.6023661532.

It can be divided in two parts, 37887 and 8477, that added together give a palindrome (46364).

The spelling of 378878477 in words is "three hundred seventy-eight million, eight hundred seventy-eight thousand, four hundred seventy-seven".