40388602 has 4 divisors (see below), whose sum is σ = 60582906. Its totient is φ = 20194300.

The previous prime is 40388599. The next prime is 40388609. The reversal of 40388602 is 20688304.

It is a happy number.

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., 38081241 + 2307361 = 6171^2 + 1519^2 .

It is not an unprimeable number, because it can be changed into a prime (40388609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097149 + ... + 10097152.

Almost surely, 2^40388602 is an apocalyptic number.

40388602 is a deficient number, since it is larger than the sum of its proper divisors (20194304).

40388602 is a wasteful number, since it uses less digits than its factorization.

40388602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20194303.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 40388602 is about 6355.2027505029. The cubic root of 40388602 is about 343.0991222163.

The spelling of 40388602 in words is "forty million, three hundred eighty-eight thousand, six hundred two".