240621406 has 4 divisors (see below), whose sum is σ = 360932112. Its totient is φ = 120310702.

The previous prime is 240621373. The next prime is 240621419. The reversal of 240621406 is 604126042.

240621406 is nontrivially palindromic in base 16.

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

It is a super-2 number, since 2×240621406² = 115797322050833672, which contains 22 as substring.

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, 60155350 + ... + 60155353.

It is an arithmetic number, because the mean of its divisors is an integer number (90233028).

Almost surely, 2^240621406 is an apocalyptic number.

240621406 is a deficient number, since it is larger than the sum of its proper divisors (120310706).

240621406 is a wasteful number, since it uses less digits than its factorization.

240621406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120310705.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 240621406 is about 15511.9762119467. The cubic root of 240621406 is about 621.9823869869.

Adding to 240621406 its reverse (604126042), we get a palindrome (844747448).

The spelling of 240621406 in words is "two hundred forty million, six hundred twenty-one thousand, four hundred six".