947478378 has 32 divisors (see below), whose sum is σ = 2362544640. Its totient is φ = 246098160.

The previous prime is 947478373. The next prime is 947478407. The reversal of 947478378 is 873874749.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (947478373) 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, 1024948 + ... + 1025871.

It is an arithmetic number, because the mean of its divisors is an integer number (73829520).

Almost surely, 2^947478378 is an apocalyptic number.

947478378 is an abundant number, since it is smaller than the sum of its proper divisors (1415066262).

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

947478378 is a wasteful number, since it uses less digits than its factorization.

947478378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050842.

The product of its digits is 9483264, while the sum is 57.

The square root of 947478378 is about 30781.1367236494. The cubic root of 947478378 is about 982.1770213044.

The spelling of 947478378 in words is "nine hundred forty-seven million, four hundred seventy-eight thousand, three hundred seventy-eight".