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30747025 = 5211092
BaseRepresentation
bin111010101001…
…0100110010001
32010212002222201
41311102212101
530332401100
63015003201
7522226321
oct165224621
963762881
1030747025
11163a0771
12a369501
1364a700a
144125281
152a7536a
hex1d52991

30747025 has 9 divisors (see below), whose sum is σ = 38160721. Its totient is φ = 24575440.

The previous prime is 30747019. The next prime is 30747029. The reversal of 30747025 is 52074703.

The square root of 30747025 is 5545.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 15816529 + 14930496 = 3977^2 + 3864^2 .

It is not a de Polignac number, because 30747025 - 211 = 30744977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30746984 and 30747002.

It is not an unprimeable number, because it can be changed into a prime (30747029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27171 + ... + 28279.

Almost surely, 230747025 is an apocalyptic number.

30747025 is the 5545-th square number.

30747025 is the 2773-rd centered octagonal number.

It is an amenable number.

30747025 is a deficient number, since it is larger than the sum of its proper divisors (7413696).

30747025 is an frugal number, since it uses more digits than its factorization.

30747025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The cubic root of 30747025 is about 313.2812240440.

The spelling of 30747025 in words is "thirty million, seven hundred forty-seven thousand, twenty-five".