34263978 has 16 divisors (see below), whose sum is σ = 78317760. Its totient is φ = 9789696.

The previous prime is 34263953. The next prime is 34264007. The reversal of 34263978 is 87936243.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 815809 = 34263978 / (3 + 4 + 2 + 6 + 3 + 9 + 7 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407863 + ... + 407946.

It is an arithmetic number, because the mean of its divisors is an integer number (4894860).

Almost surely, 2^34263978 is an apocalyptic number.

34263978 is an abundant number, since it is smaller than the sum of its proper divisors (44053782).

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

34263978 is a wasteful number, since it uses less digits than its factorization.

34263978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815821.

The product of its digits is 217728, while the sum is 42.

The square root of 34263978 is about 5853.5440546732. The cubic root of 34263978 is about 324.7974374833.

The spelling of 34263978 in words is "thirty-four million, two hundred sixty-three thousand, nine hundred seventy-eight".