1973730 has 32 divisors (see below), whose sum is σ = 5168448. Its totient is φ = 478400.

The previous prime is 1973723. The next prime is 1973731. The reversal of 1973730 is 373791.

It is a super-2 number, since 2×1973730² = 7791220225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1973731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2661 + ... + 3320.

It is an arithmetic number, because the mean of its divisors is an integer number (161514).

2^1973730 is an apocalyptic number.

1973730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1973730 is an abundant number, since it is smaller than the sum of its proper divisors (3194718).

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

1973730 is a wasteful number, since it uses less digits than its factorization.

1973730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002.

The product of its (nonzero) digits is 3969, while the sum is 30.

The square root of 1973730 is about 1404.8950138711. The cubic root of 1973730 is about 125.4380365323.

The spelling of 1973730 in words is "one million, nine hundred seventy-three thousand, seven hundred thirty".