40210078 has 4 divisors (see below), whose sum is σ = 60315120. Its totient is φ = 20105038.

The previous prime is 40210063. The next prime is 40210091. The reversal of 40210078 is 87001204.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052518 + ... + 10052521.

It is an arithmetic number, because the mean of its divisors is an integer number (15078780).

Almost surely, 2^40210078 is an apocalyptic number.

40210078 is a deficient number, since it is larger than the sum of its proper divisors (20105042).

40210078 is a wasteful number, since it uses less digits than its factorization.

40210078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20105041.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 40210078 is about 6341.1416953101. The cubic root of 40210078 is about 342.5928581226.

The spelling of 40210078 in words is "forty million, two hundred ten thousand, seventy-eight".