213843740 has 24 divisors (see below), whose sum is σ = 489897072. Its totient is φ = 77761280.

The previous prime is 213843739. The next prime is 213843769. The reversal of 213843740 is 47348312.

It is a junction number, because it is equal to n+sod(n) for n = 213843697 and 213843706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485789 + ... + 486228.

It is an arithmetic number, because the mean of its divisors is an integer number (20412378).

Almost surely, 2^213843740 is an apocalyptic number.

213843740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213843740 is an abundant number, since it is smaller than the sum of its proper divisors (276053332).

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

213843740 is a wasteful number, since it uses less digits than its factorization.

213843740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972037 (or 972035 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 213843740 is about 14623.3970061679. The cubic root of 213843740 is about 597.9967822707.

The spelling of 213843740 in words is "two hundred thirteen million, eight hundred forty-three thousand, seven hundred forty".