40161626 has 4 divisors (see below), whose sum is σ = 60242442. Its totient is φ = 20080812.

The previous prime is 40161619. The next prime is 40161629. The reversal of 40161626 is 62616104.

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., 34164025 + 5997601 = 5845^2 + 2449^2 .

It is a super-3 number, since 3×40161626³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40161595 and 40161604.

It is not an unprimeable number, because it can be changed into a prime (40161629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10040405 + ... + 10040408.

Almost surely, 2^40161626 is an apocalyptic number.

40161626 is a deficient number, since it is larger than the sum of its proper divisors (20080816).

40161626 is a wasteful number, since it uses less digits than its factorization.

40161626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20080815.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 40161626 is about 6337.3200960658. The cubic root of 40161626 is about 342.4551979332.

The spelling of 40161626 in words is "forty million, one hundred sixty-one thousand, six hundred twenty-six".