40294778 has 4 divisors (see below), whose sum is σ = 60442170. Its totient is φ = 20147388.

The previous prime is 40294769. The next prime is 40294789. The reversal of 40294778 is 87749204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25877569 + 14417209 = 5087^2 + 3797^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073693 + ... + 10073696.

Almost surely, 2^40294778 is an apocalyptic number.

40294778 is a deficient number, since it is larger than the sum of its proper divisors (20147392).

40294778 is a wasteful number, since it uses less digits than its factorization.

40294778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20147391.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 40294778 is about 6347.8167900468. The cubic root of 40294778 is about 342.8332395207.

The spelling of 40294778 in words is "forty million, two hundred ninety-four thousand, seven hundred seventy-eight".