742683780 has 144 divisors (see below), whose sum is σ = 2381695680. Its totient is φ = 186810624.

The previous prime is 742683779. The next prime is 742683787. The reversal of 742683780 is 87386247.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (742683787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1357467 + ... + 1358013.

Almost surely, 2^742683780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 742683780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190847840).

742683780 is an abundant number, since it is smaller than the sum of its proper divisors (1639011900).

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

742683780 is a wasteful number, since it uses less digits than its factorization.

742683780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 973 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 742683780 is about 27252.2252302450. The cubic root of 742683780 is about 905.5963144627.

The spelling of 742683780 in words is "seven hundred forty-two million, six hundred eighty-three thousand, seven hundred eighty".