1621811034 has 24 divisors (see below), whose sum is σ = 3529412640. Its totient is φ = 538220808.

The previous prime is 1621811011. The next prime is 1621811041. The reversal of 1621811034 is 4301181261.

It is a happy number.

1621811034 is a `hidden beast` number, since 1 + 621 + 8 + 1 + 1 + 0 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1621810989 and 1621811007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194374 + ... + 202545.

It is an arithmetic number, because the mean of its divisors is an integer number (147058860).

Almost surely, 2^1621811034 is an apocalyptic number.

1621811034 is an abundant number, since it is smaller than the sum of its proper divisors (1907601606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621811034 is a wasteful number, since it uses less digits than its factorization.

1621811034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397154 (or 397151 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1621811034 is about 40271.7150615665. The cubic root of 1621811034 is about 1174.8977811183.

Adding to 1621811034 its reverse (4301181261), we get a palindrome (5922992295).

The spelling of 1621811034 in words is "one billion, six hundred twenty-one million, eight hundred eleven thousand, thirty-four".