40278699 has 24 divisors (see below), whose sum is σ = 59659392. Its totient is φ = 26179200.

The previous prime is 40278691. The next prime is 40278761. The reversal of 40278699 is 99687204.

It is a happy number.

It is not a de Polignac number, because 40278699 - 2³ = 40278691 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (40278691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66054 + ... + 66660.

It is an arithmetic number, because the mean of its divisors is an integer number (2485808).

Almost surely, 2^40278699 is an apocalyptic number.

40278699 is a deficient number, since it is larger than the sum of its proper divisors (19380693).

40278699 is a wasteful number, since it uses less digits than its factorization.

40278699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 40278699 is about 6346.5501652473. The cubic root of 40278699 is about 342.7876327092.

The spelling of 40278699 in words is "forty million, two hundred seventy-eight thousand, six hundred ninety-nine".