621040442 has 8 divisors (see below), whose sum is σ = 1016248032. Its totient is φ = 282291100.

The previous prime is 621040439. The next prime is 621040499. The reversal of 621040442 is 244040126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14114534 + ... + 14114577.

It is an arithmetic number, because the mean of its divisors is an integer number (127031004).

Almost surely, 2^621040442 is an apocalyptic number.

621040442 is a deficient number, since it is larger than the sum of its proper divisors (395207590).

621040442 is a wasteful number, since it uses less digits than its factorization.

621040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28229124.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 621040442 is about 24920.6830163220. The cubic root of 621040442 is about 853.1786139509.

Adding to 621040442 its reverse (244040126), we get a palindrome (865080568).

The spelling of 621040442 in words is "six hundred twenty-one million, forty thousand, four hundred forty-two".