1906724820 has 384 divisors, whose sum is σ = 7315660800. Its totient is φ = 358225920.

The previous prime is 1906724801. The next prime is 1906724821. The reversal of 1906724820 is 284276091.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906724821) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 3182881 + ... + 3183479.

It is an arithmetic number, because the mean of its divisors is an integer number (19051200).

Almost surely, 2^1906724820 is an apocalyptic number.

1906724820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906724820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3657830400).

1906724820 is an abundant number, since it is smaller than the sum of its proper divisors (5408935980).

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

1906724820 is a wasteful number, since it uses less digits than its factorization.

1906724820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1906724820 is about 43666.0602756878. The cubic root of 1906724820 is about 1240.0218561878.

The spelling of 1906724820 in words is "one billion, nine hundred six million, seven hundred twenty-four thousand, eight hundred twenty".